I HAVE WIPED MY PC WITH SOMESOFTWARE

[ELLYGINO]

i CAN'T INSTALL WINDOWS 7 BACK WITH AN UPGRADE I HAVE PLEASE HELP..

 

[scorpinock2]

You need to buy the new OS if you don't have the original unupgraded copy of windows. Sorry.

 

[Perfectjake]

when you bought windows 7 did you get a sticker to stick on your PC?
Otherwise it could be on the email you bought 7 with