Answers:
chck your recent files folder.
START BUTTON, and here shoul be a recent documents folder within.
Unless they cleared it, or removed it, it should show which are the up-to-the-minute files open.
As far as internet...history works unless they cleared it.
There are ways, but you wouldnt be capable of go and get really information that efficiently in need know almost logical gobbledygook and window system structure. but if the directory for instance they be looking at is a word record, or an internet site, or some folder dealing next to a program, GO into the menu for window and choose history, it will show you the most just now access files contained by demand they be view at what afternoon. perfect luck
well you can go and get a keylogger and see if any key be typed... and next to knoledge you can do this remotely...
If you own a pretty suitable hypothesis what you have view yourself on your computer contained by yesteryear you can check the folder history and see if anything is unknown to you. If so someone have used your computer after you. I presume you may be speaking of remote systems and I'm not physical sure how these work (zombie machines) as they are call but I believe if you own a upright pop-up blocker these can be prevented.