question about pirated operating systems

need assitances, i plan on reinstalling windows on my compy but i dont have a disk, i could use some help as far as installing a downloaded version goes, never done it before is all n id like to ask those who have for a bit o help

Torrent sites like TPB and picktorrent.
read the comments... if the file size seems weird or the extension... don't dl
Scan with av and malware programs first.. pray it works

Or linux for free. http://www.ubuntu.com/

Is there a sticky on your computer with your windows serial? If yes, you might be able to install windows with that serial and have it passed off as legit. (It'll actually *be* legit, since if you have such a sticker, then you have a valid license).

read the sticker for what version it is though, and download that version... don't go downloading and installing xp pro if the sticker says xp home edition.. shit won't work.