Try disconnecting your PC from the network, and monitor the CPU usage again for a while.
If it drops, your PC may have been running some rogue program, eg junk mailer, etc.
If it remains high, you may have some runaway background job polling something. Just a guess. :dunno:
Another good spyware scanner is Ad Aware. Just look for it at www.download.com. You might wanna try installing a firewall like ZoneAlarm. They can help you identify if there are viruses or trojan horses running on your system.
i seldom use windows, 90% of the time on Linux. My windows AV (tried a few) is always up to date and scan appear clean (my game machine). However, when I scan NT2k from Linux, in average I still found 2-3 malicious backdoors or trojans/spywares monthly in the windoze machine.
hmmmm..... that only happens to Windows or it's cousins. They write into the registary but never delete it when you uninstall the software. Chances are they get slower by the day until it literally crawls.
Have anyone uses web version of anti-virus scan? As we can see, these kind of program can access your deepest windows as long as they prompt u a certificate and u allow access. So, if these web-AV can open yr files in HDD and clean them meaning that someone can write some script that fake a utility or prompt that can write into your system without even u noticing and even if you are not in windows admin account.
Some of this pop-up says "[Enter] [Cancel]" are you not sure cancel doesn't do the same as enter? These prompt can be anything behind regardless of the name of the button prompt.
Also, if windows can install system files in non admin account simply by a pop-up prompt and not signing in the admin account(it's just a user/passwd not a real admin user signin unlike unix eg.), a script can be smart enuf to prevent the access control prompt by bypassing it.
There was this incident where I open a port temporary waiting for a friend to connect to it to play Fifa and while waiting abt 15min, my system was infected by a trojan. It suckup all the available memory and start to synflood my network trying to spread more.
How can I infected just by opening this port? Then I found the trojan and after doing some research, this trojan is able to emulate itself as a client connection protocol that keep scanning for this common port Fifa game use. One it find a fifa game with open port, it emulate as a client to connect itself and when the server start to accept data, it plant the code in the system but ofcos there is no real fifa game connection since it's faking it.
Just like that.
Ofcos I like Windows too. No point making MacOS or Linux to behave like Windows. While I do mostly in Linux, I have multiboot to Windows for games, MP3, scanning and for thing that windows does better. So, dun say I comdemn Windows :blah: