are you going to use the current install? If you aren't, you can do this and move the licence itself to another PC (If win 10 was an upgrade from 7 or 8) - Reactivating win 10 on new hardware
then its best to just download the Windows 10 media creation tool
and use it to make a win 10 installer on USB, so you know you have latest build and fresh install win 10 on new PC as all the drivers on old one won't match new.
If you intend to keep using current PC, you will need to buy a new licence.
win 10 will only install off USB or DVD, so can't use an internal drive to run install.