I was given a Dell Optiplex 755 with a bad hardrive. I swapped it for a 1.5tb Seagate and installed Windows 7 Ultimate a friend gave me. He Dl'd it from somewhere and hasnt had issues. I've been using it since September without issues accept for not being able to activate it. I've re-armed it twice to give me 30 more days. I've tried Keys found here http://forums.mydigitallife.net/threads/10370-Windows-7-OEM-SLP-Key-Collection and checked them with PID checker Every time I go to activate I get "Error code 0xC004E003" Any ideas?