Frustrating Bug in MS Visual Studio 2005
In last days I experience some annoying and frustrating bug in MS Visual Studio 2005 (at work and at home). I write some project in VB.Net, this project is included in solution that contains another ten projects, that written in VB and C#. In the middle of work with IDE I receive error message: "Microsoft(R) Visual Basic Compiler has encountered a problem and needs to close. We are sorry for the inconvenience", and IDE crushes.
I made quick search in MSDN and found that this is known bug and MS provides some fixes (patches). For some reason I can't handle with installation of these patches. When I try to execute the EXE of the patch I get some unclear message: "This patch package could not be opened. Verify that the patch package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows installer patch package", and setup closes. I've reinstalled the "Windows Installer" - didn't help.
Error messages from VB.Net IDE:
Shown when I typed something in VB:

Details of the error report (contents' log doesn't say anything to me):

If I continue to work after this error was shown, IDE looses intellisence and crahes soon...
Error message before the IDE crashes:

Hot-Fix links from MSDN: http://support.microsoft.com/kb/915038, http://support.microsoft.com/kb/917452.
When I open patch files (VS80-KB917452-X86-ENU.exe or VS80-KB915038-X86-ENU.exe):

I've googled for this kind of bug, some programmers met it and uses fixes and some programmers couldn't solve the problem and reinstalled the VS; I really don't want to reinstall the entire VS2005.
Maybe someone met this bug in VS2005 and can help? Please advice, thanks.