I need to re install windows 7 without a CD (I have a windows key). I have windows 7 Home premium 64 bit
Commenting so this gets onto the side of the homepage...
DERP!!!!!
GREY-HAM!
USE THE POWER OF THE GOOOOOGLE!!!
XD
Open up the iso in winrar or 7zip then run the exe file in there (forget what it is called, probably windows.exe or something) and do the "upgrade".
Didn't I give you some simple instructions on how to do it.
http://goo.gl/FzTTEh
Here is the link from microsoft to download an iso image of the home premium 64 bits disc of windows 7.
http://msft.digitalrivercontent.net/win/X17-58997.iso
And here is a video of how to put that image into a USB drive so you can boot with it.
http://www.youtube.com/watch?v=aFJwiILbsdo
If you have access to another PC or laptop, You could you this Microsoft tool along with your iso image to create a bootable USB drive to install your OS.
Microsoft Tool: http://www.microsoftstore.com/store?Action=html&Locale=en_US&SiteID=msusa&pbPage=Help_Win7_usbdvd_dwnTool