I fear that my PC is over heating although it has had the same setup\nfor a year or more now. Everytime i boot up the pc works for a few\nminutes before rebooting. I have installed some Sisoft software which\nindicates my cpu is running at 123c which seems very high (not sure how\naccurate the software is?!). What could be causing the high temp? I\nhave done some decorating recently floor sanding(few months back),\nwhich I think may be the cause?! The pc was not in the room but the\nwhole house was coated in dust. What is the best cause of action to\nclean the computer/fix the overheating?!