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“CLR initialization failed with error 800700c1.”

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#1 _Adi


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Posted 21 October 2014 - 01:41 PM



  I have Windows 7 running in Parallels Desktop 10 for Mac.


Although things have worked in the past, recently, several application will not run and I get the following error:

CLR initialization failed with error 800700c1.


This includes chocolatey and powershell..

I couldn't find any solution to this.

Also, when I attempted "Control Panel->Troubleshooting->Fix Problems with Windows Update" I get an error dialog with the exact same code.

I also tried repairing and updating the .NET Framework installation, but to no avail.

More repair attempts:

  • chkdsk: Windows has checked the file system and found no problems.
  • SFC /scannow: Windows Resource Protection did not find any integrity violations. 

I get the same error with another user and also in Safe Mode.

I am truly baffled.


Update: I think it is related to the following DLL:C:\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9alel8e3b_8.0.50727.3053_x-ww_b80fa8ca\MSVCR80.dll. It is apparently corrupted.

When I try to open in in depends it gives an error: "No DOS or PE signature found. This file is not a valid 32-bit or 64-bit Windows module."


Please advise,


Also asked here.

Edited by _Adi, 21 October 2014 - 03:52 PM.

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#2 _Adi

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Posted 21 October 2014 - 04:20 PM



I finally got it fixed.

As I suspected, it was related to a (possibly) corrupt 64-bit DLL MSVCR80.DLL.

I uninstalled all the "Microsoft Visual C++ 2005 Redistributable" packages (both 32 and 64 bit) via the regular uninstall screen from the Control Panel - I had 3 such packages.
After this, everything returned to working order.

Edited by _Adi, 21 October 2014 - 04:21 PM.

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