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My CPU usage is very high by default. As soon as I starts a program it touches the maximum. After some time it becomes normal. I have a doubt that my disk is infected. So I tried to install MalwareBytes and Kasperkey to scan it. But they consume most of the CPU.
My entire system hangs and I can't scan my system. It restarts some time. Can anybody suggest me a solution for this? And can anybody suggest me a lightweight antivirus suitable for a Pentium 4, 2.4 GHz, 1 GB RAM running Windows XP Service Pack 3?
The problem still persists, here is the print screen of process explorer. It's showing 96-100% cpu usage by interrupts. My machine is crawling because of this. Can anybody give me a solution?
5Use the Task Manager to find out what process is using most of the CPU... My primary guess is a virus. – Breakthrough – 2011-08-29T13:47:53.273
I tried it. But as I have mentioned, most of the time the program last started, consumes most of the CPU. eg. If I start my task manager to check the CPU usage, it starts to consume 60-70% of CPU for few seconds and than it becomes normal. Same with firefox. – narayanpatra – 2011-08-29T13:52:43.703
If you need a decent AV, go with Microsoft Security Essentials. Free, fast, and made by the people who made the OS. – Breakthrough – 2011-08-29T14:12:30.643
Also, start Windows in safe mode and do the scan. – Sathyajith Bhat – 2011-08-29T14:43:32.107
It's not necessary to use safe mode for scanning a system that has two virus scanners installed. – Tamara Wijsman – 2011-08-29T15:05:53.233
http://www.msfn.org/board/topic/140264-how-to-get-the-cause-of-high-cpu-usage-caused-by-apps/ – Moab – 2011-08-29T15:07:46.157
http://www.msfn.org/board/topic/140263-how-to-get-the-cause-of-high-cpu-usage-by-dpc-interrupt/ – Moab – 2011-08-29T15:07:55.687
Do you still have this problem? http://superuser.com/questions/379698/system-and-interrupts-high-cpu
– Mateen Ulhaq – 2012-01-18T07:16:11.117