Originally posted by LikeASong:[..]
He means right-click the big (blue, if you have Windows XP, dark grey if you have Vista, etc) bar on the low part of the screen where programs and windows open.
Otherwise, push Ctrl + Alt + Supr at the same time and the Task Manager will open. Then look for the tab saying "Processes" or something like that and check if there's any taking a big part of your memory
I feel like an idiot around you guys

Edit: Its full of all those random processes again :S