I have a PC which has windows XP home installed. I have the key but unfortunately do not posses the original install disk. I do however have a XP home OEM version disk. I want to do a format and re-install the OS. My question is can i use the OEM disk and simply input the other key that goes with that PC. The PC is unbranded as such but in the system details there is a "Cisnet" logo and name where it gives details of the OS and Ram etc. I understand that this means the windows installed may be a mass volume edition and the OEM disk will not work with the key i have. Is there anyway i can make a new install disk with a combination of whats on the PC and on the OEM disk. Remember i have none of the original disks. If possible, *****s guide please.