Posted 16 September 2008 - 01:27 AM
I'm at the end of my rope here. Hopefully someone has been through this and can help me out.
This might be kind of long, but I think its best to include whatever details I can:
I have Win XP Home and McAfee.
A week or so ago firefox 3.0.1 began to crash, multiple times a day. This has never happened in the many years I have used FireFox. I became suspicious and I either opened up my task manager or Mcafee, I don't remember which one I did first. Anyway, the CPU usage was maxed at 100% and I knew that meant something was slowing down the computer so I looked to see what I could shut off, but nothing would help it. I soon realized that the cpu usage would stay "steady" at around 30% with nothing open, but once I open firefox or McAfee or just about anything it would rocket up to 100% and stay there.
At that same time McCafee told me it needed attention and shut off real time scanning (but not firewall) and told me to "Fix." I clicked Fix and the download/update icon appeared and that likewise made the cpu go up to 100%. But that isn't all, the update icon would turn on every now and then saying it was updating, but the McAfee error would never go away. I searched for hours online (esp at McAfee forums, no help) but nothing significant. I did everything (many time over 2 days) from restarting the computer to reinstalling McAfee, running update, checking clock, etc, etc and still nothing.
All this time I was worried I had a virus (and still am worried), but I couldnt get friggin McAfee to work to do a scan! Finally a McCafee online support guy sent me a link, and that worked for about an hour then the same error came up so I figured look elsewhere. It turned out McAfee DAT file was from Dec-1999, and that cannot be right, 10 years old for a 2008 version of McAfee? McAfee says that error appears but I am still protected, like that relieved anything. I heard of similar cases online, and I ended up downloading Malwarebytes and Avast.
Malwarebytes picked up a few things, and I was happy to see that, but still the CPU issue remained. I tried doing a scan with Avast, but the CPU at 100% kept the scan stuck for at least an hour so I figured it best to stop before something burns up. I tried running Avast in Safemode, but the computer would freeze after I pushed F5 and the Safemode menu came up. I finally found I could reboot into safemode so I did that, but the CPU issue still slowed things down so I gave up on that as well. All of this took hours upon hours looking for solutions.
Then, today, I tried the McAfee link again and McAfee's errors are gone and I can scan. I did a full scan and all it found was something called Reboot-AH. I found nothing significant online about this, but I had McAfee delete it anyway. Still, as I type, the problem remains. McCafee has not gone back to trouble yet, though the DAT file still says December 1999.
If you are still reading this, I thank you for putting up with me. If anyone knows how to help I would be greatly indebted to you. At this point I'm pretty sure it is not a virus, but I wont be surprised if it is.
My cpu usage still sticks at 100% whenever any basic windows are opened and running (eg page loading on firefox), does anyone know what is wrong or how to help?