As an IT professional who works in an office, I can't in good conscience answer that question. Bosses who monitor everything their employees do make for a miserable workplace. For the love of god, don't do it.
What you should do is get a web filter that blocks undesirable content. Our web filter blocks streaming content, games, and questionable material. That way you can control what your employees do, but they won't be worried about big brother always looking over their shoulders.
