Visual Studio 2010 doesn’t start – missing ATL100.dll

dllvisual studio 2010

After installing Visual Studio 2010 Premium and trying to start it, following error message pops up:
Program can't be started, ATL100.dll is missing. Reinstall program to solve the problem.

I searched for the ATL100.dll and found it in:

  • "C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\redist\ia64\Microsoft.VC100.ATL"
  • "C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\redist\x64\Microsoft.VC100.ATL"
  • "C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\redist\x86\Microsoft.VC100.ATL"

Copying the file to "C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE" also won't work.
Any tips how to fix this problem so i can start VS 2010 ?

Best Answer

If ATL stands for "Active Type Library" then it could be some helper DLL for it. Because ATL also is a COM based framework, it could be necessary to register the DLL. Copying would not work in that case.

regsvr32 ATl100.dll

Just a hint for the next time.

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