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My computer is running windows 8, and suddenly started running slowly. When I open the task manager, it tells me that the CPU is using 99% - sometimes the disk usages jumps up as well.
The strange thing is, when I use the task manager to find the application or process, which are taking all the CPU, it is just randomly selects an app that gets a high % of the CPU. If I close the app that takes a lot of CPU, it just gives another app a high amount of CPU usage.
But if I open almost anything on the computer, that specific application will be given a high CPU % - that counts for all apps, but not windows itself. I been monitoring the CPU temperature, but it is below 40 Celsius. I tried to scan the computer with McAfee, but it stalls at 51% at an element name “rootkit”
I’ve been researching a lot to solve the problem, but I can’t do it on my own :’(
Okay, so i got Ubuntu to work on the computer, and it's running fast and smoothly - the CPU usage is "okay"
I also removed "cryptinno" with mcafee, but the CPU usage is still high when using windows
1Maybe you can download Ubuntu live CD/DVD and test your hardware there (so you won't need to install) with a different operating system. If you see the same behavior you can assume it's an issue in the hardware. – drk.com.ar – 2014-07-02T17:32:00.113
So I did as I was told, and it works fine with another OS - so it's not a hardware problem.
What do I then do? – MagnusMga – 2014-07-03T10:03:32.593
If cleaning your system up (as suggested in other replies) doesn't work you better install Windows over. Rootkits are really difficult to remove so formatting and fresh install is recommended. – drk.com.ar – 2014-07-04T13:29:18.383
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I had a similar problem that turned out to be a "wild" interrupt from my WiFi adapter. Simply leaving the adapter turned on fixed it. Installing Process Explorer (which you can download free from Microsoft) provides a bit better view of this.
– Daniel R Hicks – 2014-10-19T12:36:16.467Given those symptoms I would worry about ransomware that hadn't finished encrypting and shown itself. – Loren Pechtel – 2016-02-06T03:04:17.083
Alternatively use process monitor. – Biswapriyo – 2017-09-27T21:25:21.730