How to disable mscorsvw.exe from startup

richlander said:

Microsoft has an updated post that might help you and others.

Wondering why mscorsvw.exe has high CPU usage? You can speed it up.

Ran across this issue this morning. Ran the updates which included about 15 .NET updates and when the computer restarted it went mad. svchost, task Manager and mscorsvw all grab a piece of the CPU and it went mental at 100% CPU usage for about 30 min, so with no end in sight I did a bit of googling and came across the above link which has a script you can download and run in order to speed up what 'mscorsvw' is doing.

Downloaded the script [its a command script that will auto close after it finishes], ran it, minimized it and let it do it's thing.

Seemed to be working as mscorsvw was generally using about 20% CPU but this script made it hog about 50%. Needless to say it took another 30 -40 min and it finally finished and the CPU usage was restored back to its normal range.

If you run into this, give it a try.

Not sure if it would help, but maybe run a few [3 or 4] of these .NET updates each day as oppose to a whole bunch in one go might help avoid excessive 'mscorsvw' activity.

Thanks for giving that script a try, Maco88.

We batch up updates as part of the monthly Patch Tuesday. Many/most system admins want the ability to plan for updates and prefer the monthly cadence that we use. There is no perfect answer, but that's why you see batching of updates. It also turns out that the batching results in less ngen compilation overall, so that's a benefit.