Run a Startup Repair
to see if it finds problems to fix - you may have to run it several times. Best to run from DVD or REpair CD.
If it persists please post back a camera snap of the screen you're describing or type out everything on it.
Is this factory preinstalled Windows 7 or did you install it yourself? WHere did you get it, if so?
Please fill out specs in bottom left corner of your post.