|In #2 you say "nothing happened" - you are pressing and holding alt and then F11 in that order? Does the screen show any activity at all; can you hear the fan and possibly hear or feel the drive spin up at all?|
Are there files on the drive you would lie to recover, save, in event of need to either reset to factory status?
In the meantime... Try an odd fix that Derek (and some of us others here) has (have) found to work at times...
Remove mains "and battery" power. Press and hold the on/off button for say 15 seconds or so . Then restore power and see if it will boot as it ought to. If per chance it does.... do "not" invoke anything akin to the factory reset routine. Rather at this stage focus on saving any personal files etc. to external media (dvd and/or an external drive).
What was the reason for going back to a windows restore point; just in-case it has some bearing here?