Difficult to say without knowing what that graphic is. Can you post a picture on imgur or so (and a link here)?
The worst things that can happen: (a) it's a hardware issue, and you need to find a repair shop, or (b) you have to reinstall Windows 7.
After updating, I tried to turn off the computer and it gave an error about an application not working. It suddendly turned off itself, without letting me click "OK" on that error. When I rebooted it, there was a strange graphic, like an old system. I tried rebooting and it froze, only the arrow worked. I pressed the on/off button to turn off it, I rebooted, and the graphic is still there. Should I use a recovery point? I'd have already done it that if it didn't froze on reboot, because I'm afraid of what could happen. Please help me