Itunes v.6.0.3 consistantly crashes my computer and blocks my anti-virus

I've been having issues with iTunes v.6 for a while now. I had trouble immediately after downloading the new version. I had to use the "Lorraine" fix to get the thing to even open! Now, I've found that Norton won't scan or update, none of my Office applications will open, and my computer crashes on a regular basis.

At this point, I'm quite tempted to just uninstall itunes completely and start over with the version in the box.

Does anyone else have any suggestions or ways to make the rest of my computer work with iTunes? I saw that there is an update for iTunes, but didn't try it as my luck has been really poor with the updates lateley. Will that one fix the issues with iTunes/Windows?

Any help would be appreciated. Also, does anyone happen to know what the support email address is for iTunes? When you call the apple help line, they tell you to email iTunes support, but I can't find an email address anywhere.

thanks.