How do i delete everything on my laptop?

[Kordakh]

i have this program that pops up every 5 seconds and i cant find it in uninstall programs and searched the faqs for the website to uninstall it and found it but it didn't take me anywhere and im thinking it was a fake website.it tried to install something else and it wont let me and my back ground is gone. the program looks like a virus protection program. i think the program was a virus and i need some way to reset my computer, delete the virus, or something else. daily motivation daily motivation daily motivation daily motivation daily motivation daily motivation daily motivation