This seems to be a new problem:
Not having MSVCR80.dll may prevent installations of some software.
I just tried to reinstall Quake on a PC - it refused to install with a message basically saying 'Couldn't find library MSVCR80.dll (required by MpShHook.dll)'.
The problem lies with the installation of Windows Defender Beta 2.0 - do you have this installed?
Some people have found that uninstalling Windows Defender Beta 2.0 resolves the problem.
I have got around it by just putting MSVCR80.dll back in Windows\System32 and leaving Windows Defender Beta 2.0 alone.
A quick look on the internet shows that this problem is affecting installations of certain software.
On my system I found 3 copies of the file - one in Windows\WinSxS\ and 2 copies inside SiSoft Sandra - so I just copied the WinSxS one across.
EDIT:
IN FACT, DON'T JUST COPY THE FILE BACK AGAIN (LIKE I DID) - IT DOESN'T SEEM TO BE THAT STRAIGHTFORWARD, SO UNINSTALLING Windows Defender Beta 2.0 MAY BE THE CURRENT SOLUTION
You can get the file here if you cannot find a copy of it:
http://www.dll-files.com/dllindex/dll-files.shtml?msvcr80
I notice it is affecting Quake 4 and Call of Duty 2. It is not really that noticeble from a Google search as most people have things already installed on their computers - this problem will rear its head if you/they try reinstalling software.
There is a good explanation of the problem at the bottom of the following web-page - from a software company who have been affected by this:
http://www.cadzation.com/HelpDesk/quickfaq.asp
Not having MSVCR80.dll may prevent installations of some software.
I just tried to reinstall Quake on a PC - it refused to install with a message basically saying 'Couldn't find library MSVCR80.dll (required by MpShHook.dll)'.
The problem lies with the installation of Windows Defender Beta 2.0 - do you have this installed?
Some people have found that uninstalling Windows Defender Beta 2.0 resolves the problem.
I have got around it by just putting MSVCR80.dll back in Windows\System32 and leaving Windows Defender Beta 2.0 alone.
A quick look on the internet shows that this problem is affecting installations of certain software.
On my system I found 3 copies of the file - one in Windows\WinSxS\ and 2 copies inside SiSoft Sandra - so I just copied the WinSxS one across.
EDIT:
IN FACT, DON'T JUST COPY THE FILE BACK AGAIN (LIKE I DID) - IT DOESN'T SEEM TO BE THAT STRAIGHTFORWARD, SO UNINSTALLING Windows Defender Beta 2.0 MAY BE THE CURRENT SOLUTION
You can get the file here if you cannot find a copy of it:
http://www.dll-files.com/dllindex/dll-files.shtml?msvcr80
I notice it is affecting Quake 4 and Call of Duty 2. It is not really that noticeble from a Google search as most people have things already installed on their computers - this problem will rear its head if you/they try reinstalling software.
There is a good explanation of the problem at the bottom of the following web-page - from a software company who have been affected by this:
http://www.cadzation.com/HelpDesk/quickfaq.asp