Britec Tech Support Forum

I have 3 product keys that are for windows 10 home that are like the example

Windows 10 Home
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

And then windows 7 home premium
Windows 7 home premium
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

I've collected some clients product keys plus my own for in case I had to reinstall windows well one night I decided to put all the windows 7 premium keys below windows 7 home premium without labeling if there in use or not and the same for windows 10 home lol

If you no longer have access to any of those machines then any fresh installs you do will simply be trial and error until you find a working key.