Although Skype enables people to exchange instant messages and initiate audio and video calls, it can sometimes be abused by other users that have access to your computer. If you want to prevent others from using Skype on your PC without uninstalling the program, use the Windows Firewall to block it. The Firewall is installed by default with the Windows operating system. You can block programs even if you're using a third-party firewall; most security solutions allow you to block programs manually.

Step 1

Press "Windows-X" to display the Power User menu and click "Control Panel" to open the utility.

Step 2

Click the "System and Security" link and then click the "Windows Firewall" link to view all settings related to the firewall.

Step 3

Click the "Advanced settings" link in the left pane to open the "Windows Firewall with Advanced Security" window.

Step 4

Click the "Outbound Rules" link in the left pane and then click "New Rule" in the Action pane. The New Outbound Rule Wizard window displays.

Step 5

Click the "Program" radio button and then click "Next." Click the "This program path:" radio button and then click "Browse" to display a file browser window.

Step 6

Select the Skype.exe file using the file explorer, click "Open" and then click "Next." By default, the Skype.exe file is located in the SystemDrive:\Program Files\Skype\Phone folder.

Step 7

Click the "Block the connection" radio button and then click "Next." Check the "Domain," "Private" and "Public" boxes to block Skype on all networks and then click "Next."

Step 8

Type a name for your new firewall rule into the "Name" field. If you like, enter a short description into the "Description (optional)" box. Click "Finish" to save and apply the rule.