How do i find and delete sample video clips that have been opened on my computer?

freshman in college, just had to move out of my dormroom because my roomate was a freak! Found him looking at pornsites on my computer. told me he was just watching clips, not downloading movies. do these clips stay on my computer, if so how do i find them and delete them?

this is also how you can download songs from flash players

i will let you know on the folder where it downloads to when i find it on my computer

type your user name in wear i say to put it

C:\Documents and Settings\put you user name hear\Local Settings\Temporary Internet Files