Visual Studio can't create web site in IIS

Question

After installing service pack 1 for Visual Studio 2010 cannot create web site in IIS. Here is error message:

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Microsoft Visual Studio
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Answer 1

Try changing the .Net version your Application Pool is using.

1. Open IIS Manager from Administrative Tools.
2. Select Application Pools on the left.
3. On the right, double click 'DefaultAppPool' (or whichever you may have created)
4. Under .Net Framework Version select v3.5.
5. Click OK and restart IIS.

I don't know if you have to restart IIS or not, but it won't hurt.