单项选择题
A.Restart the Workstation service on your computer.
B.Change all of your TCP port exceptions to UDP port exceptions.
C.Ensure parental controls are not configured to block file sharing.
D.Clear the Block all incoming connections check box in Windows Firewall.
单项选择题 You need to remove any Microsoft Windows Internet Explorer 7 add-ons in Microsoft Windows Vista computers that do not have prior approval from the following authorities： Microsoft System manufacturer Service provider What should you do？ （）
单项选择题 You share your computer with other users. You install a new Microsoft Windows Internet Explorer add-on to view videos on the computer. You discover that this add-on conflicts with existing add-ons that other users frequently require. You need to ensure that you are able to view videos without affecting other users. What should you do？（）
单项选择题 You need to reduce the level of access that a malicious Web site might have to your computer. What should you do？ （）