Could I ask this question? PC running Windows 7 Doing nothing unusual then crashes with the blue screen. Eventually got it back using the built in start up repair. I went to system restore thinking it would be a better repair and there was no restore points. That shouldn't have been as I always keep a couple. It crashed again so when I did get it started again I made a restore point. My question what is the cause of the O.S. losing it's restore points? Hope to get a reply.