if you are looking Windows 7 Product Key that will work 100 percent on both 32 and 64 Bit, so then I provide you some Windows 7 Product Key
windows 7 professional - dell - 32KD2-K9CTF-M3DJT-4J3WC-733WD
windows 7 professional - Acer - YKHFT-KW986-GK4PY-FDWYH-7TP9F
windows 7 professional - hp - 74T2M-DKDBC-788W3-H689G-6P6GT
windows 7 professional - Samsung - GMJQF-JC7VC-76HMH-M4RKY-V4HX6
or you can download or get more product keys from a site which post link is given
Windows 7 Product Key