Hi Hughesy. The fact that you were able to boot into Safe Mode tells us that your problem was caused by something - a program or driver - that was loading at startup. Some of the worst offenders in this respect are badly written adware. I think that all you need do now is to do a thorough scan for viruses and malware. Assuming that you already have a good antivirus running, try an online scan with Ewido click here to see if something is lurking in the background. Also have a look at what programs are loading at startup via Start - Run, msconfig - Startup.