Hmmm In LW tools>options>advanced>system startup --- uncheck --- run on system startup --- click apply then ok

Also if you don't use iTunes uncheck those boxes click apply then okay.

Just a few thoughts.

What version of windows are you running and sp?
What video display adapter do you have?
What chipset and cpu do you have?
What java version do you have?

I have seen this problem caused by a variety of reasons. Each one having there own sollution, and some that don't work at all.

Best of luck