BSOD crash while playing TSW, can't boot to safe mode to diagnose

My wife's PC crashed today. She's been running the PC for months without problem. Today she tried to play a game (The Secret World). After playing for about 20 minutes, she got a BSOD. When she rebooted, the PC is giving her the "Startup Repair cannot repair this computer automatically." In order to diagnose the problem, I need to boot into safe mode, but because her machine has a UEFI BIOD, I cannot figure out how to get it to boot into Safe Mode. Can anybody tell me how to get into safe mode? BTW, the motherboard is an ASUS P8Z77-M Pro.

Negative. Every time I tries to boot it I get the Startup Repair thing.

Will do. I'll let you know how it goes.

Using the install disc I was able to get into the Startup Repair and run it three times with a reboot in between each try. I'm trying to run SFC /SCANNOW, but it says, "There is a system repair pending which requires a reboot to complete. Restart Windows and run sfc again." I guess I should have said in my OP that SFC is what I was specifically trying to run. I've restarted twice, but I keep getting that error.

I created a system image using Macrium when I installed Windows (this time) on her system. I can restore that, but I'm afraid that this will lose any diag info that can help diagnose the cause of the crash. This is probably the sixth or seventh time this has happened on this PC. I was able to recover the PC once - I'm pretty sure it was the first time - but usually I end up having to reformat and install from scratch. Since that's quite time consuming, I did the Macrium backup this time.

Am I better off restoring the backup image and try to figure out what's wrong with the system like that, or try to get the access to the dump files/log files that can help diagnose the cause of the crash first?

I guess the more important question is; Is there a way I can get the PC to the point where I can run SFC /SCANNOW? If so, how?

Will do. It will have to wait until tomorrow though, as I'm on my way to work, and won't be back until then.

I got the restore on the image file done. However, when I created the image, was just on a clean install. I have to install drivers and standard programs. I should have that done tomorrow.

What is the first thing you want me to do to help you help me troubleshoot this?