|OK, here's the situation...|
When I switch my PC on, and XP loads up, I get a "Dial-up Connection" prompt - This wasn't happening a week ago. If I close it, it comes back.
If I connect to the internet, my CPU Usage goes up to 100%, and "explorer.exe" is the program using up all the CPU Usage. If I close "explorer.exe" whilst online, the CPU Usage goes back down to a respectable level. As soon as I re-open "explorer.exe", the CPU shoots back up to 100%.
If I close "explorer.exe", disconnect from the internet, then re-open "explorer.exe", the CPU Usage, again, runs at a respectable level. As soon as I re-connect to the internet, the CPU Usage quickly hits 100%.
I'm pretty sure my PC's infected with something, but I don't have a clue what with.
I haven't found copies of "explorer.exe" anywhere where they shouldn't be, and unfortunately haven't found anything online that has helped me out in the slightest in regards to this particular situation.
I have run full system scans with the latest updates and definitions on Norton, Spybot, Ad-Aware, Trojan Hunter, Microsoft AntiSpyware, NoAdware and Swat It, but they have found nothing of any severity.
Any suggestions? This is really bugging the hell out of me!