Question

Windows has blocked access to these files to help to protect your computer ...

Asked by: Raisor

Hi,

"Windows has blocked access to these files to help to protect your computer" ... but I don't want to be protected!!!

I have written a compression/decompression (zip/unzip) program to deliver highly sized reports in text format to some of our sales offices -> the process is completely automated and starts with a SQL Server Agent Job -> some stored procedures query for data -> export it into TXT files -> when finished some module cares for file compression to ZIP format -> when finished another module attaches the ZIP file to an email -> last step is that emails are send ... all working fine, all perfect ... just ... when anyone on a Windows 2003 Server system tries to open the ZIP with the standard "Compressed Folder" utility it looks empty (still having the expected size) ... telling the utility to "Extract All", that anoying message pops up ... instead, opening it with WinRAR (for example) works fine ...

What can I do about this (at file creation!!!) -> I have to deliver it in basic ZIP format as there is no tool to deliver with the zipped reports -> it has to be opened also with the "Windows Compressed Files" utility ...


Best regards,
Raisor

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Asked On
2006-01-31 at 05:33:27ID21716844
Tags

blocked

,

windows

,

has

,

access

,

files

Topic

Windows 2003 Server

Participating Experts
2
Points
500
Comments
10

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Answers

 

by: RatOmeterPosted on 2006-02-10 at 07:11:29ID: 15923146

It is the Windows Attachment Manager that's prevent the files to be opened.

Read more here: http://support.microsoft.com/default.aspx?scid=kb;en-us;883260

In short, to "unblock" the file, Microsoft says to:

1.      Right-click the blocked file, and then click Properties.
2.      In the General tab, click Unblock.

 

by: RatOmeterPosted on 2006-02-10 at 07:17:29ID: 15923206


Also note that you can have the users add your host/server(s) to their "trusted sites" zone.  Control Panel->Security Center, click Internet Options, Security tab, Trusted sites, click the Add button

 

by: RatOmeterPosted on 2006-02-10 at 07:26:02ID: 15923288

Um, after some googling, it appears other people are having the same problem and

There is NO "Unblock" option in the file properties.  From this message at the microsoft forums, dated today

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=226335&SiteID=1

" I actually have someone at Microsoft working on the issue.  I was able to get the attention of someone in development there who was able to recreate the issue and they are now working on it.

I haven't gotten a status report in a few days, so maybe I'll email them today and see whats up...

I'll keep you posted though..."

I think we need to keep an eye on that URL for the solution. I'll let you know what I find.

 

by: RatOmeterPosted on 2006-02-10 at 09:22:42ID: 15924531

Have you verified whether or not your users can see an "Unblock" button on the General tab in the file properties?

 

by: RatOmeterPosted on 2006-02-10 at 23:00:23ID: 15929511

I have been able to reproduce the problem with a file provided by "stewart05" in the previously linked MSDN forum thread. I've also queried for help in the SharpZipLib forums ( http://community.sharpdevelop.net/forums/5110/ShowThread.aspx#5110 ) where stewart05 was asking the same questions.  

Am I correct in assuming that your program is using the SharpZipLib compression library?

Anyway, I hope that we can get some answers, either from Microsoft or the SharpDevelopment folks fairly soon.

 

by: RatOmeterPosted on 2006-02-13 at 11:07:14ID: 15943978

Have you reviewed the external thread I liinked?  Are you using the SharpZipLib compression library?  If so, have you checked difference between using "the full path" and a "relative path"?

 

by: RatOmeterPosted on 2006-02-15 at 12:32:08ID: 15964503

Raisor, if this problem/question is important to you, you may wish to review my last message. Every other report I found that had enough supporting info seemed to indicate the trigger for this behavior by Windows is creating a zip with SharpZipLib and using the full file path, rather than relative.

Please respond.

 

by: RatOmeterPosted on 2006-02-15 at 12:56:59ID: 15964781

Bah. The answer (assuming you're using SharpZipLib) was staring me in the face at this link:

http://community.sharpdevelop.net/forums/thread/4532.aspx

In my opinion, SharpZipLib shouldn't allow you to programatically create an invalid filename/path, but if follow the code and its subsequent fix (in the link above), you should be OK.

 

by: RaisorPosted on 2006-02-19 at 03:33:28ID: 15993405

Hi,

Sorry for not answering to all your suggestions ... but it appeared that I wasn't online for about 10 days!

http://community.sharpdevelop.net/forums/thread/4532.aspx solves the issue!

Thanks a lot for your help and for the huge investigation you've done!


Best regards,
Raisor

 

by: milehighsanddollarPosted on 2007-12-18 at 15:31:00ID: 20496524

I installed WinZip and it extracted without any issues.

20120131-EE-VQP-002

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