Do computers keep a log of every single activity that you have done on that computer? For example, let's say I dragged and dropped a file onto a external hard drive. Or picked up a folder and moved it to a different place on the desktop. Do personal computers keep a log of that sort of activity, or is it government owned computers that typically log that stuff? If so, how computer savvy do you have to be to get that sort of information? Let's say there are 100 computers all tied to a single network. So there is an activity log for 100 computers that are regularly used by government employees Mon - Fri. Does the activity log compile a massive, collective list of all the activity done on those 100 computers into an administrator's computer? Or is that list split by each individual computer? How easy would it be to locate, "Mr. John Doe's computer logged that at 5:30 p.m, he deleted a file, copied a file onto an external hard drive, and downloaded porn."