CPU usage is very high until I open task manager (is this a virus?)

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LUCAAAAAAASSSS

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Jan 13, 2016
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So, I had barely any money and I really wanted Fallout 4 so I decided to get it the dodgy way (very bad idea, I'll stick to G2A in the future) and after having my PC off overnight and when I turned it back on, all was fine until when the windows lock screen came up. When it came up, my CPU fan got really loud so I checked task manager and for a second, CPU usage was at 100% then it was at something really low (5%)

I checked my UEFI settings to see if my CPU fan mode was on "performance" (maximum) because I usually keep it on "silent". It was on silent. But when I turned it on, it was still really loud so I got a trial of Kaspersky to see if it was a virus, I found Adware but nothing too major. I did some research and found something called Igfxupdate.exe but I couldn't find that in task manager or the System32 folder

Does anyone know what's happening? Plase help
 
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