Windows Start Up Screen In Wrong Position?

Over the last several weeks, when I start up my Acer Netbook with Windows 7 starter, the first screen with the enter password box is loading up about an inch too low. As a result every screen winds up being too low ant the bottom of every page gets cut off and I can't scroll all the way down.

At first I would get this problem every once in a while, now it is happening constantly. Once in a while it will start up in the right location

The people at Microsoft says it is a problem with the operating system and offered to fix it at a substantial cost since the warranty just expired, of course. I also chatted with the manufacturer who suggested the problem was (a) corrupt file(s). I listened to their suggested solution and formatted the hard drive back to factory default condition. for a minute it looked like I solved the problem as on the firs couple of start ups the problem was gone. But soon after attempting to restore my files the problem came back and I still have it.