Hi,
I have the same type of the problem that discussesed in the thread on the link:
http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=121785&SiteID=1
But when I check my regestry editor I have found the following values :
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\8.0\Help\0x0409\{221CD402-A57E-40D5-8341-46B37DB01B58}]
"(Default)" = "(value not set)"
"Filename"="ms-help://MS.VSCC.v80"
"VS_Docs"="Not Supported"
So, help me what can I do
Thanks.
Aya.

problem : 'information not found' when using MSDN library by hitting F1.
citizenDAK
From the other thread, it looks like you need to download MSDN Library for Visual Studio 2005. Here's a copy of that post, let me know if I missed something and/or you have further questions!
Thanks,
Jeremy Jones
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Hello Aya - MSDN Library for Visual Studio 2005 is only available for download to MSDN Premium and Universal Subscribers. If you have that type of subscription, you can log into the MSDN Subscriber download center here:
http://msdn.microsoft.com/subscriptions/
Once you are logged in, you can find MSDN Library for Visual Studio 2005 under the following node in the subscriber downloads area:
Developer Tools
Visual Studio 2005
English
MSDN Library for Visual Studio 2005
Paul O'Rear
Program Manager, Help Integration