Visual Studio bug - Error writing the project file. Class not registered.

Question

I have just upgraded from Visual Web Developer Express 2008 to Visual Web Developer Express 2010. However, I can't use it. When I try to create a new project I get a small dialog box that says:

Error writing the project file. Class not registered.

I have tried reinstalling and repairing the product to no avail.

Answer 1

The problem was MSXML6 was corrupt.

The answer is here:

http://www.ferolen.com/blog/error-install-ms-sql-server-express-in-windows-xp-sp3-msxml6-sp2/

But then I couldn't uninstall MSXML6 which led me to here:

http://www.thewindowsclub.com/microsoft-retires-windows-installer-cleanup-utility and this download page

Then I reinstalled MSXML6 from http://www.microsoft.com/downloads/details.aspx?familyid=d21c292c-368b-4ce1-9dab-3e9827b70604&displaylang=en#filelist

and it worked.