In my experience, the XP disk type used for the installation needs to be a match for the key code range. Give more about how XP was installed and what sort of disk was used. For laptops, you really need the manufacturer's disks or those which can be produced from within the factory installation.
Im using a laptop with winXP. but the installation key is not Valid. I have the OEM key and I want to change it.
I tried the tool (KeyUpdateTool_enu.exe) to change key. but it gives an error.
Then I used the registry edit method, and it doesn't accept the OEM key.
Please help. Is it possible to change it without formatting ?