For the problem occurred before the company, I have been using Trend Micro resolved, and now more and more developed network technology, the greater the danger we are essentially the greatest harm is the information leaked, so there Trend Micro if you can avoid this problem, after all, what company there are many documents are to be kept confidential, usually ordinary employees can not see, let alone a large number of leaked. The company itself also has a firewall, but if it is new out of some computer virus, there is no way to promptly recognize, will go wrong. Later I heard that Trend Micro is actually better, so he used a Trend Micro, now I feel much better.