The white box is caused by...
INTERNET EXPLORER?! Why must one program completely rely on another? I was experiencing a similar problem with ***** previously, and fixed that by changing settings in IE. Unlike McAfee, I actually use *****, so I'm not changing those settings back.* I'm just going to remove McAfee from the list of programs that run at start-up, once I find out how.
*(McAfee's expired; I'm using the Norton provided by my ISP)