By safe mode do you mean you see Safe Mode in all four corners of the screen or do you mean that your video doesn't look the way it should? The reason I ask is because people get that confused all the time. Provided it's not actually in Safe Mode, the thing to do is reinstall your video driver. If it is in Safe Mode, then some software or driver that you've installed recently is causing the computer to reboot.... check for an update for that software or driver.
Personally, I think ME is total crap. Another tech I talked to once dubbed it "Mistake Edition" and I've had no reason to disagree.