Hey guys. I'm new to the forum but I'm having issues with my computer. Just today I was using it and the program I was using split in half and the screen freaked out. So I turned it off and opened it back up and it started working again for 15 minutes. Then it completely shut down. I put it into single user mode and did a disk check/repair. It worked and got me back into the desktop and I left it aside to download some things I was trying to download. Came back a few hours later and it was frozen. Turned it off and now even with single user mode I can't it on. What's also strange is I can't get it into recovery mode, safe mode or anything else except single user mode. It is a 2011 15 inch MacBook pro running the latest version of Yosemite. The last thing I will mention which I find strange is since Yosemite, my computer lets me choose a user and attempt to login before it proceeds to load any data, while all my other friends and family with macs on yosemite show the data loading then login screen. Not sure if that has anything to do with it, but I thought I'd mention it. Thanks ahead of time for the help, really appreciate it!