What about checking how much the directories take that you mounted?

Download Windirstat.

Well after i noticed the decrease in space i deleted all the game files and folders i was using and did a complete cleanup of the HD, including temp, internet etc....its just a way lot of gigs to dissapear, so im not sure if im looking in the right places for something that was saved somehow by dosbox, or i tweaked a setting somehow to utilize a ton of space...im using vista if that makes a difference...thanks

DOSBox doesn't write anywhere except to the mounted directories unless you tell it to, so if you've deleted them and you're still 100% positive you're suddenly missing a ton of space, chances are much more likely that you've got a virus that is using your computer to share warez/child porn/other illegal stuff, and you should really get that taken care of. DosFreak's advice is good, use WinDirStat to see where your disk space is going.

Edit: Another thought, I suppose it's also possible you inadvertently turned on the video recording function by hitting Ctrl+Alt+F5.

Also it could be data that is hidden in Alternate Data Streams. It won't show in Windows explorer.

LADs is a freeware app that can view data hidden via ADS. It's covered in the first link. The second link shows you how ADS works and how to hide data in such a way.

http://www.windowsecurity.com/articles/altern … ta_streams.html

http://www.securityfocus.com/infocus/1822