I just bought 3 years subs and installed it on Win 7 , I also have windows 10 in the same device. can I install the same over there also?
Well, as far as I know, since your key is single PC based and you have already activated it on Windows 7, I don't think you will be able to use the same key again in Windows 10 on the different partition of the same PC because if you will try to activate using the same key in Windows 10, it might/ will show that the key is already used.
Well I would see if another community member agrees to this or has some additional information regarding this (@Jayakrishnan)
Regards
Flex
(Bitdefender beta tester 2019/ 2020)
Yes, I think what @Flexx said is correct !