USAFRet :
1. You need a whole new Windows license. You can't use the same one on 2 PC's
2. For your new system, you need to reinstall the OS on the SSD. It probably won't boot up seeing the new hardware.
... but he said he got a new PC... so I'm assuming that new PC was an OEM model with Windows preinstalled... If that is the case.. it's a piece of cake to move media files... with a simple cut/paste command.
One thing that isn't clear is... do you want to use the SSD as your new Boot O/S (recommended) or do you want to keep and use it as a secondary drive?