CPU Usage jumping up and down

Joshxp

Distinguished
Nov 17, 2015
31
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18,530
Hello Guys.
My Spec here :
Intel G3220 Haswell Series 1150 3.0Ghz 3mb Cache
ASRock H81-M VG2. R4
8GB Ram ( Dual Channel ) 1600
GTX 750Ti 2GB
Windows 7 Ultimate SP 1 OEM 64 Bit
The First Issues come when i downloaded virus program, i already remove it using all antivirus i have, then i using DLL Fix, CCleaner, MalwareBytes and i think all it's clean then i re-install my windows, install all driver i have.
Then, i tried to streaming on Twitch, but i got shocked when i streaming i get lag, i think this is not usually happen, then i check the task manager, how i shock while i seem my cpu usage got 80 - 90% When i'm stream on twitch. ( Usually 40 - 60% CPU Usage ) ahh i think this normal, then i try to update my old driver then try to run again CPU Usage reduced but not go back to normal, the CPU Usage still consuming 70 - 80%,
So, i try to open my game Dota 2, how incredible shock i am, my cpu usage got 99% how usually i think 80 - 90%.
i try to re-scan with all antivirus i have but the result is same no virus all clean !!!
and i try to go to internet cafe near my home, try to open all same program, then on internet cafe pc it's consumsing about 40% when Stream on Twitch, and about 80% when Playing Dota 2.
Specs on my internet cafe
AMD X3 440 Processor 3.0 Ghz
2GB Ram
I Think the problem is my pc is dirty, but whether a dirty can make my pc peformance slow ?
Appreciate early answers.

Sorry about my grammar 😀
 


i will try to clean up my PC, and i will back again.
but, could i still need re-install my pc again or nope ?
 


i know, then how to make my pc like a new ? should i format all disk like C: and D: then install new clean windows ? can it make my pc like new ? or nope ? i don't know how this rare problem found, and this is a new problem to me 🙁 i don't know how what to do, and how to fix this... hope clean my pc from dirty can make it running better 🙁