This might sound stupid, but most PC's have room for a second or more hard drives, why not simply install the drive off your old PC and disconnect the new one leaving it pristine and unused in case ever needed or setting it up to dual boot, so you can choose which one to use.
I use cloning software on mine, but that will wipe whatevers on the new PC drive or use one drive, see the link. you can also connect up an external HD and transfer, see
https://www.computerworld.com/articl...indows-pc.html
https://www.microsoft.com/en-gb/wind...sfer-your-data
When i fired up my new pc it downloaded tons from the cloud and set it up.
you can also get a lead and transfer from your old PC hard drive by USB