when was this?
the 365 version is only available through online subscription as far as i've seen.
if you had a Home & Student version installed on the system when you purchased it then you would need a link from the manufacturer to re-download this activated OEM version.
when you wiped your OEM version of Windows and installed a copy downloaded from Microsoft you forfeited any OEM software that came with that OEM install.
That's right, sorry I was kinda out of my mind bcz after clean install of windows 10, my pc is so messed up. using windows from windows 98, and I have to say windows 7 was the best windows ever.....
I requested for the factory reset file from the manufacturer and they provided me what I want. Now I have to do what I have to do. All these occurred bcz I accidentally used "clean junk" feature of Avira antivirus and maybe it corrupted/deleted my system files which broke 1. Windows Update, 2. SFC and, 3. DISM. Tried everything to avoid clean windows installation but in vain, nothing was able to repair system files. Now I'm screwed :-( .
Thank you all for your suggestion, time and effort. it really helped.