Well if you idle at 60C that's a bit hot, it's likely to go over 75 under load which isn't all that good. You could be getting the BSOD when the CPU pass 70C as it starts making some error.

What brand of CPU is it? some have different temp. threshold

Also regular maintance that I do with my computer include, vacumming the case, check if you can tuck away cable away from the HSF (Heatsink/fan) also try to have a clear path between your case's fans.

You might need to replace the thermal compound also...again depends on what kind of CPU it is. I just changed mine yesterday. If you can still boot there's a good chance nothing fried and is in working order.