In your attempts to revive W7, I presume you got to the Windows Advanced Options menu, and from there selected Safe Mode.
Try selecting: ' Last Known Good Configuration' option
(Calls on the most recent settings that worked)
If no-go, have you tried: 'Repair the computer' option?
Also, what kind of computer is this? Brand/Model i.e. Inspiron X1234
Do you know if the Windows 7 is 32-bit or 64-bit?
Retired - Doin' Dis, Dat, and slapping malware.