Reinstallation without cd

hoopzers3

Honorable
Mar 5, 2012
18
0
10,510
Hi guys, i am wanting to reinstall my computer and windows 7 to clear my hard drive and any malware that is in the pc. The question i have is do i need the actually cd of windows 7 to reinstall it or can i just use my product key that i got by using magical jelly bean? This is also a pc that i built and i bought windows 7 home premium but lost the cd. Thanks for the help guys.
 

hoopzers3

Honorable
Mar 5, 2012
18
0
10,510


ok one more question i think. im using imgburn and i dont know how to find the iso file... Do you know where i can find that file?