Win 10 Update question ?

I have one PC and run Win8.1 or Win10. depending on which SSD I use
I run Win7 most of the time and every few months pit the Win 8.1 SSD to get the updates

They are Win 7 Ultimate and Win8.1 Pro versions

Question is if I update the Win8.1 SSD to Win10 and put it back in the drawer,
will the Win7 SSD run ok on the same system.

I really have no need for Win10 but would like to update the Win8.1 in case I need it in the future

Thanks

iamlost said:

Question is if I update the Win8.1 SSD to Win10 and put it back in the drawer,
will the Win7 SSD run ok on the same system.

Yes. Windows 10 will not do anything to keep the computer from Windows 7.