My lag problem returns...

[FrozenMind]

No reboots, no new hardware, random programs like: multimedia player, instant messaging, download manager, also i reinstalled my anti-virus but the internet was off when i did so.
And i dont have a router.

Edited: I found what the problem is, it's the spyware that keeps getting into my PC from random ads and pop-ups, I'll take care of it...thanks for caring, you're the best!