my computer keeps restarting on its own even if i do not select restart. while playing solitaire or surfing the web, it suddenly goes off and restarts. my mouse also has a problem. it sometimes jumps randomly as if there is someone controlling it. and lstly, my cd burner doesn't read cds(or more specifically reads them for a really long time then stops and doesn't work). nothing was changed, it wasn't taken out and worked fine a month ago, i've tried restarting etc. what could the problem be?