Dec 14, · High CPU Usage in Windows Pro 64bit. Running right now. Firestorm Viewer (Second life 3rd party viewer) Avast Antivirus (beta-to fix issues) IE 11 Desktop. and Modern Mail App. Recently updated was Logitech Gaming Software to Nov 04, · Well I updated from windows 8 Pro to Windows Pro, and that was from Windows store. I had high cpu usage, you should not kill any thing in your task manager. Now this is the solution, download an original Windows ISO from internet and then install it. I had problems with updating from Store, try this method everyone. Hope this helps.
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