Ever since I installed a software called Arena improperly, I haven't been able to get rid of it. Every time I try to uninstall it from Control Panel it says to put the CD back in, but I don't have the CD anymore. The biggest problem is now whenever I try to run any .exe file Vista attempts to "configure Arena" first. Of course that doesn't work, so then none of the executable files I download can run.

PLEASE HELP!!!