Windows 10: Computer had windows 10 when purchased. was changed to 8.1. Can I get back to 10?

computer had windows 10 orignally and was changed to 8.1. Ca it be changed back to 10?

:)

 

Need specifics on RAID 10

step 1) purchase a raid card that does raid 10 and has 4x mini sas. you will want at least 1024 ram on that chip.
step 2) purchase 16 2 TB enterprise class constellation drives
step 3) purchase another whole rig to do the same thing
step 4) setup rsync to copy all of the changed data from server 1 to server 2
step 5) buy 2 800 watt BBU (1 for each)

there.

 

Unlocked Realtek HD Audio Drivers Windows 7 & 8 (With Dolby Digital Live and DTS Interactive)

DTS supported natively by Windows 8/8.1 and it should work on windows 10 too just DDL require to unlock your driver .

 

How to reinstall Windows 10 if my computers used the free upgrade from 7 and 8?

Will windows 10 still accept the license keys from 7 and 8 now if I reinstall my computer?

Does Microsoft keep a list of users who upgraded to Win 10 using their 7 and 8 keys so that when users need to reinstall windows 10 the old keys would work?

Do I need to call in Microsoft to ask them to activate my Windows 10 when I give them my win 7 keys?

Both computers are laptops. The windows 7 machine had the serial printed on the back, and I needed to enter that when I upgraded to 10. The windows 8 machine had the serial built in inside its boot system so I didn't need to enter the key when I upgraded to 10, but I did manage to write down the keys using a fetcher program.