I purchased the Windows XP Upgrade for my old system. I installed the upgrade and liked the functionality then decided to go all out with upgrades! I purchased a new P4 motherboard and processor and am building a new system. In the process I learned that my old system was on RESTORE disks therefore I could not transfer my XP Upgrade to the new system. I will be selling my old system and intend to take it back to original configuration from the RESTORE disks which was Windows ME.

My question is can I now sell my Windows XP Upgrade to someone locally? It will not be installed on the system I am getting rid of and I have purchased the full version for my new system. I did install and register it to my old machine but it will no longer be on there and I would have better success selling it separate if it could still be installed and registered?