Windows 7: reinstate win 7 with no disk from using abuntu

Hi can someone please help me, I have a Toshiba satellite Pro C650 at present I am running on Abuntu but the laptop was originally running windows 7, that came pre-installed so I have no disk and I have lost approx three to four numbers on my coa label on base of laptop. Can anyone help me reinstall windows 7 on my laptop. Abuntu is ok but I miss all my options etc with wind 7 and I run two businesses from this laptop and starting to rip my hair out. I think the orig win 7 system was wiped and replaced.
I do have a wind xp disc service pack 2 but unsure if that is of any use.
Any help advice would be brilliant thanks guys.

Did you make the OEM manufacturer's Recovery Disks?

How to use Toshiba Recovery.
How to use the Toshiba HDD Recovery Utility

You can order Toshiba Recovery disks from here:
https://www.csd.toshiba.com/cgi-bin/...rification.jsp

Press and hold the 0 (zero) key on your keyboard while powering on the computer. When the computer powers on, the Toshiba Recovery Wizard screen displays.

Hi No I stupidly did not make back up discs, so am I screwed do I need to buy a new full copy of XP or wind 7.

Hi OK Will I then be able to reinstate win 7 or is the fact my coa is incomplete block my progress

I would have a word with Toshiba first, if you are lucky Toshiba may send out a copy of disks for free.

This would reinstall from the recovery partition (if that partition still exists). The product key is automatically set. No need to worry abour COA.

Try running Factory Recovery as given by whs. If the hotkey will not trigger it and you know the partition is still intact, try marking it Active then rebooting using the hotkey again as this sometimes will start Factory Recovery.

If it fails, call Toshiba Tech Support to both order Recovery Disks and recover your COA sticker's Product Key.