I am currently in the Microsoft Office 2010 tech preview and I must say that I am loving it! 
What I did not love though was after installing Office 2010, my Visual Studio 2010 Beta stopped working, simply displaying the message “Cannot Create The Window”.
Microsoft claimed not to be able to recreate the issue and I was quite happy to wait until another version of VS 2010 was released, but luckily for me, Microsoft have now found the issue. Apparently, there is a version msvcm100.dll in C:\windows\system32 which is different in office 2010 than in vs 2010. It also seems that office and vs play nice when using the VS version of the dll, but that VS falls over when using the office version.
Ok, so to the workaround……
You have two options;
1. Replace the msvcm100.dll with this one, msvcm100.zip, I took from my system32 folder.
or
2. If you would prefer not to use a randomly downloaded dll from here, you can rename the msvcm100.dll in system32 to msvcm100.dll.old and then run VS 2010 setup and choose to repair. This will recreate the dll.
The working version of msvcm100.dll has a datetime stamp of 6th May 2009 7:20AM.
Well, now my Visual Studio is working again, I am off to have a play!
Enjoy!
9 comments
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Kevin.Jee says:
September 27, 2009 at 12:20 am (UTC -5)
thanks very much ! i get this wrong at once!
shansheng says:
September 28, 2009 at 6:21 am (UTC -5)
谢谢
3q
thanks
Admart says:
September 29, 2009 at 3:06 pm (UTC -5)
Thank you! I replaced msvcm100.dll you uploaded, now it is works.
Oleg says:
October 7, 2009 at 4:34 pm (UTC -5)
I’ve was tackling with this on-and-off whole day. Now I’ve vs2010 running! how did you pin-pointed the cause?
Gary Pretty says:
October 7, 2009 at 5:50 pm (UTC -5)
I am a member of the Office 2010 Tech Preview and quite a few people on the Microsoft Connect forums had the same problem and it turns out that one of the folks at MS had posted the solution somewhere on the forum, so I thought I would spread the word! Glad it helped you!
mais says:
October 26, 2009 at 11:52 pm (UTC -5)
i got the same error but i do not have office2010 installed on my rig.. got any idea how to fix this?
newbie says:
October 28, 2009 at 10:26 am (UTC -5)
I get same error but this solution didn’t repair it. I wasn’t installed any office or anything but I got beta 2.
david says:
November 26, 2009 at 1:58 am (UTC -5)
me too, beta 2 on a clean env, and get the error.
Lalit Dwivedi says:
September 9, 2010 at 1:43 am (UTC -5)
It’s working fine on my system. ‘windowscodecs.dll’ was missing on system, I restored it and now VS 2010 is running fine.