Use Remote Desktop when Windows Firewall is on
Because Windows Firewall restricts communication between your computer and the Internet, you might need to change settings for Remote Desktop Connection so that it can work properly.
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Open Windows Firewall by clicking the Start button 
, clicking Control Panel, clicking Security, and then clicking Windows Firewall.
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Click Allow a program through Windows Firewall.
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
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Under Program or port, select the check box next to Remote Desktop, and then click OK.
