A file that size is most likely containing something you don't want.. I'm not entirely sure, but I do think you should run your antivirus program, Spybot and Adaware.

Best to check out the online virus checker too if yours doesn't find anything...

http://housecall.trendmicro.com/hous...start_corp.asp

Also go here and do this scan too...

http://www.windowsecurity.com/trojanscan/

Hope you come up clean

__________________
~Kath~
Always judge a person by the way they treat someone who can be of no possible use to them