Windows 7 legit serials sponsored by Amjad (Please say thanks in the original thread)
Serials working for both 32 bit and 64 bit versions

ISO name: en_windows_7_ultimate_x86_dvd_x15-65921.iso
Source: Original MSDN (My MSDN Account)

Serials:
FHY4Q-VB63H-XK8VD-9Y68P-RFQ43
J6C9R-C9HHG-3CWTY-Y4MPW-CD72J

As the keys get blocked, I will keep providing new ones, just let me know.