Computer lagging unexplainably - CPU spikes?

November 29, 2011 at 15:46:31
Specs: Windows 7 Home Premium x64, Intel Core i7 1.6GHz/4GB
So, my computer has been having this particular issue recently, where I will be operating perfectly fine one minute, to lagging horribly the next. Skype calls, for example, will go from running at a regular speed to sounding detached and almost robotic, though apparently I will sound fine to the other members of the call, provided I'm not hosting. When I open my task manager, or go further into my Resource Monitor, while lagging it will say that my CPU is running anywhere from 30% to 99%, however the processes and applications I may be running don't match up to the CPU usage. This can last anywhere from five to forty minutes, and then it will drop back to normal operation (CPU hovering around 8%).

Now, I've asked friends and relatives for assistance on this, and the most common answer I've gotten back from them is that I have a virus. I've scanned my computer multiple times, both during lag and when my computer is running normally, and Avast is unable to pick up anything. I have run my computer in Safe Mode, and it seems to work just fine while in that, however as soon as I go back to regular operation it has its lag spikes.

And, seeing as it didn't post my computer's specs up top very well, I'll put them here too. I'm running W7 Home Premium x64 on a HP Pavilion dv6 - 3132 TX, with Core i7 1.6GHz and 4GB RAM.

This is my first post here, so hopefully I haven't done too badly, but please let me know if I was supposed to put something in here, and didn't.

Thanks in advance!

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November 30, 2011 at 05:14:28
Just because AVAST came up clean doesn't mean there's not an infection. Did you have a bunch of crap loading at startup & running in the background? Have you tried running in safe mode to see if the problem still exists? Have you run a cleaning program such as CCleaner? Have you run a malware scan with MalwareByte's Anti-malware?

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November 30, 2011 at 12:46:05
Anything that starts up and runs in the background, that shows up in Task Manager, I can identify, and as I said in my original post, I've run in Safe Mode just fine. I use CCleaner regularly as well, however I haven't run it this time, and I'll get to why I haven't.

As I kept asking my friends for assistance, one continuously suggested I run Advanced SystemCare through my computer. I caved and ran it, and it seemed to fix the problem for the time being.

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November 30, 2011 at 19:40:54
Run Malwarebytes as mentioned above.
Install Process Explorer from Microsoft since it will show you more about the processes running than Task Manager (it's one of their pro-tools).
Run msconfig and go to the Start tab and uncheck almost everything except your antivirus program and microsoft items, apply and restart the system.
Use Disk Clean up utility that is part of Windows.

You have to be a little bit crazy to keep you from going insane.

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