Try # 1

Am going to clean my STUDIO PC using a can of compressed air I bought yesterday. There's a good chance that dust is clogging it the hot weather, making it overheat and reboot. It's cool today, but a good clean wouldn't hurt. This PC has been cleaned before after similar symptoms and that was all it needed.

If not, I'll investigate other solutions.

Today's been stressed

Cleaning made no difference to the PC.

Have had a sinus headache all day.

Have almost recovered everything off the PC, but it's messy.

Bleagh.