I have windows XP SP3 on a Dell Inspiron 1501. Recently AVG kind of misbehaved, ie it refused to update and was giving me alerts, so i uninstalled it and put Symantec. This worked for me but of recent, it won't update, and my CPU usage is always 100%. The computer has become sooooo slow.
I ran Malwarebyte's Anti-Malware, it scanned and got some nasties, but still the computer isn't fine, plus it's starting to take really long to shutdown, yesterday i spent like 30 minutes waiting until i gave up!
Please help :(