Please perform the following and let us know if the CPU usage is still 100% then we can help narrow it down.
How to perform Clean Boot
To enter a clean boot state, type msconfig in start search and hit Enter to open the System Configuration Utility. Click the General tab, and then click Selective Startup. Clear the Load Startup Items check box, and ensure that Load System Services and Use Original boot configuration are checked.
Next, click the Services tab. Select the Hide All Microsoft Services check box. Now click Disable all.
Click Apply/OK and restart the computer. This will put Windows into a Clean Boot State.
If the clean boot helped you fix the error, Great! Else in the General tab, also click to clear the Load System Services check box, click Apply/OK and restart.
To configure Windows to use the normal startup state, simply undo the changes.
Best to always create a system restore point first!
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I try to respond in 24-48 hours normally and I am more active on weekdays than weekends. However, sometimes due to my health, family or life it may take me a little longer. If you have not heard from me within 72 hours then please PM me a reminder.
BC BSOD Posting Instructions