Please help me - Macrium failed to restore my PC to be useable again!

Hi, I have used Macrium (free) in the past to back up my C drive and have created a couple of disk images which have in the past successfully restored in the event of a crisis.

Recently my PC started doing a few funny things (sleep results in fan constantly going, occasionally can't awake from sleep but fan still goes etc). I played around with the power settings today and also changed the BIOS setting from Auto to S3 (save to RAM). When I rebooted the "Windows starting" splash screen came on but when it went, just a blank black screen with a mouse pointer (normal size for the resolution I'm using, implying the graphics card was supporting the resolution I normally use). This happened repeatedly and I was unable to get past it to the pale blue login screen by any means. But I can log in as normal if I boot through Safe Mode (and am posting this via Safe Mode with networking).

I restored my operating system disk today using Macrium, then booted up normally. To my dismay, after "Windows starting".....still a black screen with nothing but a mouse pointer that I can move around. Control+alt+del and Windows key + P do nothing. Where have I gone wrong? I'm pretty sure that my other BIOS settings (e.g. AHCI rather than IDE - I'm using an SSD) are unchanged. Thanks for advice.

BTW I am using a desktop system, i7 six core processor, two Nvidia 210 graphics cards, 24GB RAM and Win 7 pro.

Update - I have at least discovered the cause of my black screen. I have four high resolution monitors, let's call them 1, 2, 3 and 4, though I only use 2 3 and 4 for running certain software otherwise they are switched off. They are set such that monitor 1 is the one with my login screen. When I booted into Safe Mode monitor 1 was the one with the login, when I was booting into normal mode monitor 3 was the one that had the login screen, I only found that out when I switched on all three other monitors.

Here's the catch though. Instead of 1920x1080, monitor 3 is now displaying only 1024x768 and the Windows Display options lists it only as a Generic non-PnP monitor (it's connected via DVI so it jolly well should be recognised as the exact monitor type that it is). I can't get it to display anything more than low resolution 1024x768 now however, despite effectively having a new Windows installation (well, backed up version with drivers that it worked at high resolution previously).

What's gone wrong?