Runtime Error: R6002 Floating Point Supported Not Loaded Error

Do you have any antivirus software? I've never seen this problem, but after reading some things about it, it's caused by earlier bad programming (not likely, since noone else is having the problem with iTunes), or a virus.

If you don't have antivirus, there are a few free ones, but I can't say I recommend them.

A couple free ones you must install:
http://free.avg.com/
http://www.clamwin.com/

And an online scanner:
http://onecare.live.com/site/en-us/default.htm?s_cid=sah

I've got the exact same problem and I just downloaded iTunes last night. I've tried restarting my system, but that doesn't help.