And try not to use a company computer for anything except work. Big corps usually have spyware installed on their computers so they can track everything you do.
The last place I worked had software that took a screenshot of your desktop every so often, and the boss could remote into your machine to see what you were up to. I didn't find out till my last day, it explained why he was so good at busting us when we were on facebook
"AA searched their exchange database for the text I posted, found the guy, and fired Mr. X on the spot."