Outlook Corrupts all office documents

Last week my outlook started corrupting word an excel documents sent as attachments. It was working fine before that but I can't preview or open files as it says there isn't a previewer installed (in outlook) or file is corrupt (opening).

I have office pro 2010 and we use windows Server 2003. Any ideas?
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Larry Struckmeyer MVPCommented:

Any other users on the domain reporting any issues like this?  Can you open the files correctly before attaching them, and after attaching them from their normal location?

Lacking that, I think I would start by removing the OL profile in Control Panel, Mail.  If that doesn't fix it, I might delete your entire profile, after insuring that your documents are secured in a safe location, and perhaps the desktop and  favorites folders, along with any other user data you don't want to lose.

In addition, always suspect your AV program.  Do not allow it to scan the exchange data folders.
rpmcclyAuthor Commented:
No, this is the only computer that does this. Yes, before sending the files are fine and other people receiving the same emails can open them fine. I'll try what you said and get back to you.
rpmcclyAuthor Commented:
I tried deleting it in control panel and adding it again - same thing. When you say delete the entire profile, do you mean to delete it on the server?
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Larry Struckmeyer MVPCommented:
Yes, before sending the files are fine and other people receiving the same emails can open them fine.

What is meant that "other people receiving the same emails can open them fine"?  Are you saying that the same messages, with the same attachement, some can open the attachement and some cannot?
rpmcclyAuthor Commented:
I'm saying, if A sends an email with an office document attached to B C and me, then B and C can open the office document but I can't. So its something on my computer but can't figure out what it is as it worked last week. I tried a system restore but didn't work.
Larry Struckmeyer MVPCommented:
But you can open word or excel docs that are not emailed?  that should rule out corrupted normal.dot and what ever the corresponging thing in excel is.  What if you first save the attached files to your desktop?

rpmcclyAuthor Commented:
Yes, I can open all excel/word/access everything with the actual programs, just nothing opened through attachments via outlook, even if I save them on the computer and open them, they are still corrupted.
Larry Struckmeyer MVPCommented:
If the user creates a word doc and saves it as a .txt file, then emails it to you, is it still corrupted?
rpmcclyAuthor Commented:
Creating a text file from word opens and previews fine.
rpmcclyAuthor Commented:
PowerPoint files don't work either (need that one)
Larry Struckmeyer MVPCommented:
Um... this is not a conflict in versions of Office by chance?

What sort of text/rubbish do you see when you try to open them?  Any error messages?  Can you post them here?

what if the user mails them to your hotmail account and you download them from there and then open them?
rpmcclyAuthor Commented:
I don't see anything. The files don't open, they all have some sort of error. As stated before, error messages are them being corrupt or can't read the file. If the same files are sent to another email they still open just fine.

If I try to open them in OWA on the server or on my local desktop, they won't open so it is something with my account...
Larry Struckmeyer MVPCommented:
OWA is not the same as outlook, but it is the same exchange mailbox.  Hate to suggest this but at this point I don't see any connection except that.  Assume OWA will not open the attachements from a remote logon from a different computer?
rpmcclyAuthor Commented:
OWA with office attachments works fine so its something on the desktop not the account!
rpmcclyAuthor Commented:
Larry Struckmeyer MVPCommented:
Ok, I had not considered that you would be using OWA from the desktop.  Thinking that you probably were RWW from home or some such.

So we have narrowed it down to the computer you use.  Windows repair?  Wipe and reinstall Windows and Office?  Give that computer to someone who does not need this functionality and get another for yourself?
rpmcclyAuthor Commented:
Well its a computer from Dell that came preinstalled with Office Pro so I am not sure I can reinstall. I was using OWA just to see if it would work.
Larry Struckmeyer MVPCommented:
Sure you can reinstall.  A computer that cannot be reinstalled is a throw away.  They are too pricey still to be throwaways.

Have you considered calling Dell to see how much if any they can help?
rpmcclyAuthor Commented:
I called and they said the warranty only covers hardware not software so I'd have to call some software hotline and pay for the service.
rpmcclyAuthor Commented:
I tried to use google docs to send an excel file and my computer still corrupted it. So I would think that means its NOT outlook, correct? I have reinstalled my Office 2010 Pro and still have all these issues....

where to now?
A. Do you have a good Anti Virus installed? is it the same product and version installed on other machines?

B: Could be the entire user profile, so try this.

1. Log  onto that same computer as a user that has never logged onto it before
2. Create a Mail profile, open Outlook and try the same action

If it works without issue then it means your user profile is probably corrupt and you can recover from it with a bit of work, i.e. copy off the data you care about,. delete the profile for your user, log back in and it will recreate.  ( Let me know if you need more info)  

 If however it still fails then I would look at;

A. Checking that computer for a possible virus, i.e. Microsoft Essentials is pretty good at rooting that type of stuff out.

B. the other possible issue is that it could be your Office installation is just corrupt, so try removing office entirely, reboot, reinstall, patch the heck out of it etc
rpmcclyAuthor Commented:
A. Yes, I have Symantec Endpoint Protection.

B. I just logged in with a new account and I still get the, "No previewer Installed" in outlook and if I download it to the desktop, it still says corrtupted.


A. I will run a Symantec Virus scan, is that good enough? Whats the Microsoft Essentials? Windows defenders?

B. I have tried a repair of outlook. We bought it with office installed from Dell so we don't have the discs and I would hate to lose 2010 if the key didn't work the second time around...
1. is the same version of Symantec Endpoint Protection installed on other machines without issue?

2. if this is the only machine using Symantec Endpoint Protection you could try installing Microsoft Essentials http://www.microsoft.com/security/pc-security/mse.aspx and then remove the Symantec Endpoint Protection on that laptop to see if it makes a difference

3. I would call Dell and ask them about re-installation of office if its needed, i.e. ask them what you need to make it happen, is there a special key to use etc.

4. You know if there is no data on the system and you have recovery disc or a built in recovery partition you could go that route which would give you a pristine start and if office was included then it should be in the recovery image.
rpmcclyAuthor Commented:
1. Yes, same version.

2. All have SEP.

3. I did, they said I could download some installer and use my key. But it basically was a repair. Anything other than that, they said I would have to call a hotline since the warranty didn't cover software.

4. I have a few other programs that would be difficult because of licensing. I would rather not reformat, basically not an option.
Yeah I understand your position.  Perhaps you can image the machine first so that you have a rollback position and then try the office repair option Dell gave you?
rpmcclyAuthor Commented:
I think I tried a system recovery when this first started happening but it didn't help.
Well how about creating a recovery point, then doing the DELL Repair and if it fails or makes things worse you can roll back?
BTW when you attach and send via Outlook is the file type holding when it gets to the destination or has is changed?  Just wondering if its a file type association issue.  Should be  easy to test

1. Attach a word or Excel document but do not send, just save the email.
2. Now re-open the unsent email, can you open the attachments without issues, if not what about saving them off to disk, whats the file type extension of each?
3. If # 2 works now send and repeat the checks for # 2.  
4. if you take these attachments and save them to disk after being sent in email whats the file extension type
Also have you installed any Office Add-ins, i.e. product that Integrate with Office.  I had another case where Excel was refusing to auto open attachments and it appeared to be corruption but it only happened AFTER they installed a 3rd party integration.  Here was the resolution to that and it may be worthwhile to test one office application at a time.

Try to re-register Excel.

1. Close Excel first
2. Start>Run "excel.exe /regserver"(no quotes)
3. Enter

NOTE: leave out the quote on the above command and be sure to leave the space between exe and /regserver

NOTE2: You might have to designate a full path to excel.exe and of so then Start>Run "C:\EnterThePathToExcel.exe\excel.exe" /regserver(quotes would be required on this command

Here are some other threads with various issues on Excel 2010 that I think will help you out


rpmcclyAuthor Commented:
When I send a file, its fine when it reaches the person. Or if I get an email with an attachment and someone else did, it works fine for them and if I get on another computer then I can open it just fine.

When I save before sending and try to read, it still gets the cannpt preview bc no previewer installed. If I download to desktop and open, says corrupt still.

I tried run > excel.exe /regserver > enter - and it just started excel....excel file in outlook still won't preview.
Check out this post regarding fixing the previewer, perhaps fixing that will also fix the corruption issue or at least shed some additional light on it http://answers.microsoft.com/en-us/office/forum/office_2010-outlook/outlook-2010-attachment-previewer-not-working/5f996e5e-2673-43d9-a4ba-cc160b1ed702
Also check your Outlook temp folder setting

 the following steps:

1. Click Start > Run and type regedit

2. Click Edit > Find and type OutlookSecureTempFolder

3. When regedit finds the entry, it will tell you where the Outlook temporary files are stored and will look something like this: C:\Documents and Settings\username \Local Settings\Temporary Internet Files\OLKrandomnumber

4. Open My Computer and navigate to this location on your hard drive.

5. Delete all of the files in this folder.

6. Restart Microsoft Outlook and you should be able to open your attachment.

NOTE: If you do not have a folder in Temporary Internet files you can also change the location to something like

C:\Documents and Settings\username \Local Settings\Temporary Internet Files\
rpmcclyAuthor Commented:
only thing i see relative was this post:
I found this answer from another user and IT WORKS GREAT!  Here is what that person wrote:  Again, thank you to that person!!

Somehow the DCOM permission got changed, so it wouldn't allow certain applications access to simple things like Preview mode on Outlook 2010 / 2007, or opening up attachments without it saying file corrupt. I also was having an issue with Pop ups in IE8, where javascript messages about security tokens were not authenticated.

The solution is as follows, and then you can turn on your protected mode back on in word, excel, and your "Preview mode" in outlook will start working again.

Go to start, then run. Type dcomcnfg and push o.k. Component Services should come up.

Expand Component Services, click on Computers, then "Right click" on My Computer and go to "properties".

Click on Default Properties tab, and make sure the following is set:

Default Authentication Level: Should say Connect, not "None"

And Default Impersonation Level: SHould say Identify.

When those are set properly, hit o.k and turn on your protected mode back on your Office applications. Everything works as expected :)

But it was already set like that. BUT I didn't turn protected mode off because I don't know how, where do I toggle that?
rpmcclyAuthor Commented:
I tried clearing the files in the OutlookSecureTempFolder and it didn't work!
rpmcclyAuthor Commented:
ok I don't have the "Protected View" in the trust center...
rpmcclyAuthor Commented:
Thanks, just got another inactive email.

Experts - Help me!
Sorry I am traveling extensively but will try to come back to this as soon as I can

BTW did you ever check this to see if it would resolve your previewer issue? http://answers.microsoft.com/en-us/office/forum/office_2010-outlook/outlook-2010-attachment-previewer-not-working/5f996e5e-2673-43d9-a4ba-cc160b1ed702
rpmcclyAuthor Commented:
I checked that again. I did have Frontpage 2003 installed so I uninstalled it, restarted, and nothing has changed. I don't have sharepoint installed. Did I miss anything there?
So what all do you have installed in terms of MS products on this machine?
rpmcclyAuthor Commented:
There is 2010 Pro and 2003 resource kit. I will try to uninstall the resource kit and restart today.
Yeah after you pull the resource Kit I would look at the above links again to ensure everything is registered properly, as well as the DCOM info.  I know its a pain but once all of the older products are out I think it would be good to double check all the potential resolutions.  Also I would take a snapshot of the system and then run the Office Repair for 2010 to see if it can self heal.
rpmcclyAuthor Commented:
Uninstalled resource kit, repaired 2010 Pro, restarted, still didn't work. Checked DCOM settings but they were correct BUT I can't turn on protected mode as said above.
Sanity check, can you turn on protected mode on another machine that is working without issues?
rpmcclyAuthor Commented:
The "Protected View" isn't in my trust center, I checked on a machine that is working and has 2010 and they also don't have the "Protected View" in the trust center. Is there something you need to do to enable this option in Trust Center or maybe an update for 2010?
ok you wont see protected view within Outlook itself, you need to do this by application, i.e. Word, Excel etc and within there you will see the option to Enable Protected View for Outlook Attachments
rpmcclyAuthor Commented:
K, went into PPT, EXCEL, WORD, un-enabled protected views but the settings for DCOM were still correct....I didn't restarted the computer but did restart outlook and still can't open anything.
ok reboot, try and then it should prompt you to open, then re-enable and try again
rpmcclyAuthor Commented:
ok i rebooted, tried and previewer failed but it didn't prompt me to open because I didn't turn off attachment previewing in outlook. So when it said it couldn't preview because none were installed, I double clicked the file, it prompted me, I clicked open, IT WORKED! BUT when I went into trust center/protected view, enabled it again, went back to outlook and tried to preview, it still didn't work. I tried to open, and it said it was corrupted. Therefore, I went back to trust center/protected view, un-enabled them again, went back to outlook, and I was able to open it again but still no preview.

So we have progress, finally. But I can't preview, which is a great feature. Whereto now?
Man this is a real bugger eh?

Ok so to recap

1. we get around the corruption issue by going into the specific applications by turning off "Enable Protected View for Outlook" Correct?

2. But that means we cannot preview the documents in Outlook,. correct?

3. If you Re-enable the protected view items become corrupted once again AND you still cannot preview, correct?
rpmcclyAuthor Commented:

1. Yes, no preview, but can atleast open it.

2. Yes ^

3. Yes.

What OS Win 7?
rpmcclyAuthor Commented:
Yes - 32 bit
rpmcclyAuthor Commented:
ok, I made all add-ins inactive, still couldn't preview. started in safe mode and tried to open it and it was still corrupted.
Whats the path that your OutlookSecureTempFolder is set to?

1. Click Start > Run and type regedit .

2. Click Edit > Find and type OutlookSecureTempFolder .

3. When regedit has found the entry, it will tell you where your Outlook temporary files are stored. It will look similar to:

C:\Documents and Settings\username \Local Settings\Temporary Internet Files\OLKrandomnumber
rpmcclyAuthor Commented:
C:\Users\*user*\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.Outlook\ZIW0935N\

I think we cleared this before, and it didn't help.
Try this

1. Close Outlook

2. Make a directory called OutlookTempFiles in  C:\Users\*user*\ and of course make sure you have full access to it

3. Then check the path in the registry to C:\Users\*user*\OutlookTempFiles

4. save the registry

4. Open Outlook and try again
rpmcclyAuthor Commented:
Nope, won't preview and still corrupt on open.
Larry Struckmeyer MVPCommented:
Hi Again:

You have been working on this for two months without sucess.  I know how frustrating that can be, but would it not make more sense to copy off your important data then wipe and reinstall Windows and your apps?  Windows Easy Transfer should make this really easy.  And if you just want to test, a new hard drive for this purpose, leaving your old drive intact is less expensive than the time you have spent on it, plus the time you will spend on it, even if you figure it out.
Man I am about out of ideas.  We are sooo close....

What else does this machine have software wise that is different from others?  Sounds like you may have several utilities others may not??

Check these threads out and please try the different options, i.e. there is one on DCOM, one on .CRV files, Temporarily disabling AV software, etc.  I know some of they may seem to be repeats but best to be very diligent if you don't want to re-image


rpmcclyAuthor Commented:
I did make a Dell backup when we got it but not after I got all my programs working. I would prefer to leave the computer intact as it would literally take me a week to get everything running properly again.

Which utilities are you asking about? I currently only have Office 2010 Pro from the office line installed.
rpmcclyAuthor Commented:
BTW, since it is partially working, reformatting the computer isn't an option to me. The only thing that isn't working is the preview. I can open the file now which is the most important part.
Sorry I meant additional programs and utilities, i.e. you mentioned uninstalling some other applications earlier so my assumption was that you had additional items installed and your comment about taking a week to get everything running properly again leads be to think you have other items on the machine as well.   Just trying to get a lay of the land and what you actually have on the machine.

What did the Dell image originally come with and is that all that's contained within the Dell backup you referenced above?
rpmcclyAuthor Commented:
I have other programs not related to Microsoft, incl Autodesk Inventor Suite, Rockwell Software, imaging software etc. Since the only thing not working is the preview feature it is NOT worth reformatting in my opinion.
What did the Dell image originally come with and is that all that's contained within the Dell backup you referenced above?
You are using all OFFICE 2010 products and not different versions, correct? i.e. are you using  Word, Excel and Outlook 2010?
When you attempt to open an office based attachment and it fails, what is it you see saved into C:\Users\*user*\OutlookTempFiles

How about when it succeeds, what is then saved in C:\Users\*user*\OutlookTempFiles
We have been through so many issues, not sure if you have done this yet, i.e. look at final post in this link

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rpmcclyAuthor Commented:
The dell image is the OS and the Office 2010 Professional. I don't think I have any other software in that backup. I am uising ONLY Office 2010 Professional (word, excel, outlook, powerpoint, access, onenote, and publisher). There is NO other office software on the computer. I've clearned the temo files so I have no idea....

You have had me do the DCOM default properties 3 or 4 times now and everything is set just as they say it should be changed to so the permissions were not changed....image below.

 DCOM Settings
ok but the default authentication level should be set to CONNECT not NONE
rpmcclyAuthor Commented:
OMG, I have read that thing a 100 times and read it wrong EVERY single time. I will change it and get back to you.
rpmcclyAuthor Commented:

That was completely my fault, I apologize. I went over those DCOM settings multiple times and read it wrong every single time. Thank you for being thorough!!!

LOL, no worries, there has been allot to keep track of, so that's why I keep repeating myself as well, hopefully this will do the trick!  :-)
Excellent, to hear, thanks for the update and glad it all works, now I need a drink LOL
rpmcclyAuthor Commented:
Slightly mis-leading but I read the Experts link wrong multiple times, make sure you have your first setting on >>>"CONNECT" <<<
Thanks for the points!
rpmcclyAuthor Commented:
HAHAHA, thanks so much lucid8, for future reference I will add screen shots more often so you should ask for them to double check settings!

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