Windows 10: w10pro upgraded, roll backto 7pro, install w10 on new ssd at a future

AMD 8 core 64 bit system I built.

1. installed free, w10pro upgrade.
2. made a disk image and repair cd.
3. can I now roll back to w7 64pro. and still keep an option to
latter do and clean & fresh w10pro install to a new ssd. (will my digital verification still be valid?
without all the fragments from 7 and my old programs?
Thank you.

:)

 

in other words dual boot W10PRO ... one key w10pro.

dual boot... one key w10pro.

I have a tricky Q

I have two bays/drives HDD (C:/ w10pro 650GB+ T:/ 350GB) +( D:/ 500GB) currently

if take the D:/ out AND IN ITS PLACE put SSD and install W10Pro (same key as C:/ - is upgrade from 8.1 pro needs key???) on SSD

can boot choose on turn on of PC either from C:/ or from SSD???

in other words
dual boot W10PRO ... one key
w10pro.

IF CAN, HOW FIND KEY W10PRO IN CURRENT???

 

Reinstalling OS - Upgrading from W7=>W10 after July29

I have upgraded my W7Pro Laptop to W10Pro already, but next week need to replace the HDD with an SSD.

My question is; what will happen when I reinstall W7 and try to Upgrade to W10 as it will be after July29. Am I still eligble for the free upgrade?

 

Sure - you can clean install at any time.

 

Until you change your Motherboard. .. Ms stores hash IDs(dont know which) as a proof of activation on their servers.
U so ever have upgraded to windows 10 make sure to sign in with Microsoft account instead of local account.. this way even if a hardware change is made to a computer you can still activate windows in case of Failure.