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Sudden slowdown high CPU usage problem

by swantonist / June 13, 2014 5:19 AM PDT

Couple of days ago My Pc experienced a sudden slowdown. I tried troubleshooting to no avail. The next day i took it to a PC repair shop and they replaced and copied the previous hard drive. When i got it back today it was still extremely slow. I ran full system scans with Spybot and Malwarebytes which both turned up nothing. I didn't do anything out of the ordinary when the coputer slowed down. Just watching a few streams then i started noticing lag.
Symptoms are as follows: When turned it on it works fine for a few minutes then slows down tremendously.

The CPU usage goes haywire. I checked all the processes in task manager and there isn't anything out of the ordinary. I don't know if there are any hidden processes.

When i move my mouse around the cpu usage jumps about 20%.

It takes about 4-6 seconds for it to respond when i try to open a webpage.

The cpu usage sometimes jumps to 99-100%

Mean CPU usage stays around 25-35% when idle.

I left the PC on overnight after this happened and when i went back on in the morning it was fine.. then slowed down again after a few minutes

I was almost positive it was a problem with the hard drive but since I now have a new one it doesn't seem so. Please help!!

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(NT) have you run chkdsk since then?
by James Denison / June 14, 2014 4:32 AM PDT
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Seems to me
by Jimmy Greystone / June 14, 2014 7:57 AM PDT

Seems to me that if you took it some place, paid them money to fix it, and the problem isn't fixed, you should keep marching back into their office and telling them to try again until either they do fix it or they refund your money so you'll go away.

Also, since we don't have any info about the OS and age of the system, if it's an IDE HDD running XP, then the XP DMA issue may have reared its ugly head.

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