Hello ExcelsiorPC, and welcome to Seven Forums.
If both PC are the same 32-bit or 64-bit type, then yes you can use it on both.
Do note that a "System Repair Disc" is not the same as an "OEM Factory Recovery/Restore disc", and cannot reinstall Windows. It can only be used to boot to and use "System Recovery Options" screen.
Hope this helps,

Shawn