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Cannot Start Outlook

Posted on 2006-04-14
Medium Priority
Last Modified: 2011-04-14
Help. I cannot start Outlook. I get a message that says "Cannot Start
Microsoft Outlook. Unable to open the Outlook Window. The set of folders
could not be opened."

As background, I had been running a GroupWise client o this machine, and I
uninstalled it using Control Panel, but I suspect there are still come
remnants and Registry entries.

Any suggestions?

Question by:harryr2000
  • 4
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LVL 97

Expert Comment

ID: 16455156
Greetings, harryr2000 !

1. Reset the Outlook toolbar template. With Outlook close, do a search for and rename outcmd.dat file. Restart Outlook and a fresh outcmd.dat file will be recreated. Outcmd.dat is located in C:\Documents and Settings\<user>\Application Data\Microsoft\Outlook folder.  It is a hidden file. Go to any folder and select Tools > Folders Options > View. Check "Show hidden files and folders". Click OK.

2. Register an important Outlook file. Go to Start > Run and type regsvr32 OLE32.DLL

3. Disable Outlook Addins.  Do a search for extend.dat and rename it.

4. Start Outlook in Safe Mode.  Go to Start > Run and type

"c:\Program Files\Microsoft Office\Office\Outlook.exe" /safe

Your path to Outlook.exe may be a little different.

5. Create a new Outlook profile.

6. Repair Outlook. With Outlook open, go to Help > Detect and Repair.

7. If no joy, reinstall Outlook.  Go to Add/Remove Programs and highlight Microsoft Office. Click on Install/Uninstall.  A menu will pop allowing you to choose repair or reinstall.


Best wishes!

Author Comment

ID: 16455252
Did not work. I found and renamed the file, but I still cannot styart Outlook. Same message.

Author Comment

ID: 16455376
Again, thanks, but I cannot get through step 1. Should I skip that and go on from there?
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LVL 97

Expert Comment

ID: 16455390
Harry, I assume you rename outcmd.dat  Did you following through with my other suggestions?

Author Comment

ID: 16456307
I fixed it myself. I got a trial copy of Reg Crawler, and located 13 old GroupWise enties. I deleted those and created a new Outlook profile, now I was able to get it running.

Now I have a new issue - on the standard toolbar there is a button for Adobe Acrobat attachment. I do not want or need this on the toolbar, because it is non=standard fpor some sceens I am shooting for a client.

How do I get rid of it? I have tried everything, but nothing seems to eliminate it.

LVL 97

Expert Comment

ID: 16456381

Glad you fixed your initial problem.  For the Adobe Acrobat attachment button, right click on the toolbar and select Customize > Command tab.  Remove the Adobe button.
LVL 97

Expert Comment

ID: 16776426
harryr2000, he fixed it bt "I deleted those and created a new Outlook profile, now I was able to get it running."

In step 5 of my first comment, I wrote to create a new Outlook profile.

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