I also experienced some of that "crazyness" on my own PC. With temperatures round here about 35-40ºC it also happens. The only way I could manage to keep the old AMD powered machine working was to leave the tower opened to allow as much heat from inside to get out... that way it seems to work, although it will get full of dust, of course... so I'll apply ur advice over here ;)

¡Salud!

T O N O