InterDev won't work!

Got a real problem!
Since an abortive attempt to load Netscape 7.0 from CD on Monday, which somehow made my PC restart, I haven't been able to get into InterDev. The Splash screen comes up then I get an Application Error and when I Debug, it gives me the following message:

"Unhandled Exception in DEVENV.EXE(MSENV.DLL) 0x0C0000005 Access Violation"

As well as replacing both DEVENV.EXE and MSENV.DLL I've tried:

1. Rebooting (approx 2,500 times!)
2. Removing and reloading InterDev.
3. Removing and reloading Visual Studio.
4. Re installing Windows 2000 Pro.
5. Re installing IE5.5.
6. RegClean.exe.
7. Praying!
8. Cursing!

....still no Go!

Oh, and I tried both the Exe and the dll with Dependency Walker - no help there either.

My next move will be to Format the drive and start over, though I am reluctant as I have stuff I don't want to lose and can't easily back up and it would take ages to do.

Then maybe suicide!!!

Any ideas? Any constructive help would be greatly appreciated.

remove the two dlls from the directory (back them up somewhere safe just in case) then try reinstalling. The problem is with your dlls, and the install program won't replace them if they already exist.