How do I reinstall windows completely on a compaq presario v6000 laptop?

It didn't come with a boot disk so I'm assuming that windows is already loaded on the hard drive. I got a virus a while back and I have ran every vius scanner I can. I just need to do it. Please respond only if you know about this specific laptop and how to redo windows on it. Also, steps would be greatly appreciated.
I am assuming that the operating sytem on this Compaq is Vista? If so, to get your computer back to it's Original Factory Condition, go to the START BUTTON , in the lower-left hand corner of your of you screen and in the SEARCH BAR, at the very button, with the white space and the blinking cursor, type RECOVERY, then after the RECOVERY MANAGER comes up in the search, click it, Then when the RECOVERY MANAGER opens click ADVANCED OPTIONS, then click SYSTEM RESTORE. It will take a while, but when this process is finished, your computer will be just like it was when you first recieved or bought it.
BE certain to back-up all of your important stuff to a flash drive. Make sure that this flash drive has ample space to hold all the stuff you want to back-up. When you start SYSTEM RESTORE you will be prompted to back-up these files automatically.
If you have any furthers, please email me @ cgs60649@yahoo.com
The only other way to do that (without being a computer guru) would be to use the actual windows xp/vista operating system disks. You can buy like an xp disk that doesn't cost that much. Although if you don't have the original disk then you could always go the Linux route..
http://www.makeuseof.com/tag/3-ways-to-install-linux-on-windows-or-mac/
Goodluck!

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go to utorrent.com
download and install
http://www.mininova.org/tor/2524578
download and open with utorrent
wait for it to download
then go download magiciso and burn the iso on to a cd
backup all your files you want
go to dell.com download your drivers
set yourcomputer to boot from a disk
-press esc or f11 to get to boot menu if that dont work
press del to get into bios navagate to the boot options
boot the disk delete partition, reformat partition it will startinstalling
when its done install drivers and other software