I just received this vacuum today, used it for all of 5 minutes when it suddenly shut off and refused to turn back on. I didn't think it overheated (it certainly didn't feel hot at all), but tried leaving it shut off for the recommended 45 minutes. It still won't turn on. Having read some of the other reviews, I would guess that this is a pretty regular occurence, and that this vacuum has some serious problems. I'm returning mine today and asking for a refund. Too bad, because for the 5 minutes it did work, it certainly seemed to be doing a really good job of vacuuming!