Extremely high CPU usage, “mscorsvw.exe”

This is caused by the .NET Runtime Optimisation Service. Run the following at a command prompt, to see if CPU utilisation drops:

c:\>ngen.exe executequeueditems

To see what this process is doing, type

c:\>ngen.exe display

Before you can use ngen, it must be installed. Please see the following article:

http://msdn.microsoft.com/en-za/magazine/cc163808(en-us).aspx#S4

For more information about someone who had the same problem, see:

http://blogs.msdn.com/b/davidnotario/archive/2005/04/27/412838.aspx

 

This will happen whenever .NET 4 is updated.  It has to recompile its assemblies.

 

I hope this helps!

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