Thanks, I just installed Kaspersky Internet Security latest version plus I have Spysweeper, both up to date and I did runned a scan with each program, they both found viruses, and other malware and apparently these were deleted or quarantined, but the problem persists.
This is my dads computer and he had Kaspersky Antivirus 6 and Zonealarm firewall installed but he did not updated them regularly and barely even scanned his PC, he also used to disable them frequently cause the PC suddenly started to get sloooow. All of our computers have these installed and none had problems but my dad
So, I uninstalled the above mentioned and installed KIS and Spysweeper, the PC stopped being slow but it did not get rid of this weird problem. I even runned the scans 2 more times and it did not found any more problems.