Re: mobo + cpu + ram upgrade windows 7 help
If you can get your hands on an OEM disc, just reinstall it. Check eBay for HP OEM copies, it isn't illegal to sell the disk it's illegal to sell the license.
As long as your PC has it's license still attached, just get the disc and windows should let you re-validate with that.
-Desktop- Dual Monitor, Q8200 2.34Ghz, 8GB, 1TB, XFX 6850, 7 Ultimate
-ASUS UL50- SU7300, 4GB, 500GB, G210M, 7 Home Premium 64, XP Pro
-HP NC6400- Core Duo 1.86Ghz, 2.5GB, 64GB SSD, x1300, XP Pro