use AdAware and AdBlock (firefox plugin) no more ads & popup
easy... if i know my computer had virus, i install & update AV then full scan my computer.
If still, i will restore my system restore..
Still problem? easy.... format my harddisk & reinstall wind0ws$..
What about OEM? U know my country, huh?
document will be lost? sometimes i backup my important document...
My document is not lot bcoz i'm still a student
u may delete this post