Recently I have a problem on my pc. Whenever I right click to open a folder assertion failure MMExtention.error message comes up.in the box it is written Module:<MMShellExtention> Assertion:<bExtentionreadable> File:<.\MMShellExtentionApp.cpp> Line: 177Clicking the closed button on the box opens the dialog box.TheMS group here in UAE could not help. is there some one who can help on this problem or do I have to download again the window soft ware.?bello autala

Can you back up your data and perform an in place upgrade with the media that you have?

Hello, I would suggest that you post this question to our Windows Vista forum as we mainly focus on Windows Server in this forum, and people there have better knowledge on this. They may also share some useful information with you. http://forums.microsoft.com/TechNet/default.aspx?ForumGroupID=204&SiteID=17 Thank you for your understanding and I hope this will be resolved soon. Best regards, Chang Yin