Create a bootable USB drive with a copy of Windows 7.Create a Windows 7 DVD for installation on a new hard drive.Updated Feb 2015: To download windows iso the following applies. Official Download source for windows 7 (32bit and 64bit) If you do not have a copy of the recovery disk, an ISO file of the windows 7 will come in handy if you have need for it. With Windows XP shutting down, users can also upgrade to the windows 7 with full support from Microsoft. With windows 8 and 8.1 having a low acceptance rate, most users prefer to downgrade their system to windows 7, been a popular and widely accepted OS after the Windows Vista disaster. This is ideal if you purchase a license key or reformatted your PC and will like to get an ISO copy of the genuine version of Microsoft OS. Windows 7 – 32bit and 64bit in the following versions professional, ultimate, and home premium can be downloaded on the official page of Microsoft approved site.