Windows 7 A╗┐UѐV@=!!​☼VѐL error before Windows 7 loads

Last week I just got a new Lenovo IdeaCentre, model: K330B-77471TU computer and have set it up, removed the trialware junk and installed a few programs (Norton AntiVirus, Office 2007, iTunes). The last program I installed was ImgBurn version 2.5.5.0 yesterday. Twice today (I have rebooted about ten times) I have gotten an error just before Windows 7 Home Premium loads. These weird A╗┐UѐV@=!!☼VѐL characters appear in the upper left corner of the screen when the screen is black (like in the old DOS days) before the animated Windows 7 graphic appears which loads before the user sign-in screen. Once I click the enter key, Windows 7 continues to load ok to the user sign-in screen.

Any clue as to what this A╗┐UѐV@=!!☼VѐL error means and how I can fix it?

Is there anyway to determine what is trying to load before the Windows 7 animated grapic appears?

How can I investigate what needs to be fixed?

Thanks in advance for your help!