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System uses up 100% cpu

Lexabord
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If i don't move the mouse for a period of time ( 4 to 4:30 seconds ) system uses up 100% cpu. The temperature changes by 5C sometimes stays the same.
If i move the mouse or click the cpu utilization drops to a normal 1% to 10% 
 

dust was cleaned 2 weeks before the problem started 

thermal paste was changed 1 month ago    

video-1530555689.mp4

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open taskmanager,sort by cpu usage and wait until it kicks in to see what program uses that much

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30 minutes ago, Lexabord said:

 

Could be that you're infected with a miner that only activates while idle?

 

did you already try reinstalling your OS?

I edit my posts a lot, Twitter is @LordStreetguru just don't ask PC questions there mostly...
 

Spoiler

 

What is your budget/country for your new PC?

 

what monitor resolution/refresh rate?

 

What games or other software do you need to run?

 

 

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