I don't see anything like that on mine, but I use Opera. Seeing as I work for technical support for a small ISP, let me ask you something: have you by chance updated recently to Internet Explorer 8?
If you have, get rid of it. It's garbage. (If you need help with this, I'll be more than happy to assist, I'll just need to know what version of Windows you have.)
And then do yourself a favor and download Firefox or Opera. They don't show the glow or shadow effects like IE, but they're much more reliable...not to mention faster and more secure.