Hy, Today i had the same problem. My antivirus detected some virus, and deleted some file ... After restarting, i coudn't log in ( administrator or my account), win 8 show only SING OUT... I tryed to press F8, Schift +8 nothink. I read a lot of about " HOW TO ENTER SAFE MODE" , but i can not enter in WINDOWS!!!! And then i insered my Windows 8 Instalation USB stick, and there is ---> Repair your computer. And then i made a repair windows 8, without lossing anny settings.
These line are confusing us & worm (SPAM ) comes out. Please elaborate it... After repair problem solve & if not,, What was error message.. Many are here to help you..
See what you've done..You actually didn't figure out how to boot in safe mode... Then you took the decision to repair the Windows 8 Installation...which seems to be successful as you confirmed doing it without losing any settings.. Good!! But the question is What is the Problem???? Explain the matter/problem that you failed to understand/resolve or if you're still facing it.
My problem was, that My AVIRA antivirus has detected and deleted some UI files from the Windows directory. ( I think that virus came from the crack, with what i have removed the watermak in windows 8)
So this is real real problem.. Please contact Crack site from where you downloaded it or Refresh you PC.