joejac...
Does that this mean you have/had a legitimate version of win7 on your laptop? I'm guessing so.
Does your computer have a Windoze sticker on it? IF it does... You can get/use/download any equal copy... and use it. Whatever version you had... basic, home, pro, ulti. The copy, whether hacked or not has to be what was on it. RE-install win7 on it, and do your extra install and tweaks.
THEN, install the latest PCLOS on a separate partition or hard-drive.
.......more if needed........