Windows 8 Can't Go Past Login Screen

After installing a game of Minecraft he claims that around that time, the computer has not been able to boot. So he brought it over to me, and I'm not to familiar with Windows 8. So I try turning on the laptop and it freezes at the login screen. It has his username, and the little loading screen like its trying to load the account, then it freezes and it stops there. So what I'm trying to do is a system restore to an earlier time. Maybe even to boot into safe mode. How to access System Restore is to hold shift while restarting the computer. Except I can't access the computer. It doesn't go past the login screen. I can go into the BIOS, but nothing else. Any method were I can do something to access system recovery another way? What I can do besides a system restore? But simply put.. Turn on, goes past the Asus loading screen, gets to login screen, username is displayed. Computer freezes. Sometimes it just goes to a black screen and stops there.