I have bought a used computer with a valid and activated Windows 7, as installed by the vendor. There is for some reason no product key attached to the case so I cannot simply reinstall Windows 7 with my own media. It also appears that it is the original OEM product keys present in the registry database, so I cannot use those either. There is no recovery partition. Now I just want some way to be able to have a backup I can restore in case of problems.
Questions are: Will Windows Backup and Restore work for me? Or do I need to make a clone of my cleaned harddisk and then clone it back?