Follow these steps to configure the ip address subnet mask and default gateway in Windows.

1. Select the Windows Start Icon > Control Panel
2. Set View by (at the upper right hand corner of the Control Panel) to Large Icons or Small Icons
3. Select Network and Sharing Center
4. Select Change adapter settings
5. Right-click on the network interface and select Properties
6. Highlight Internet Protocol Version 4 (TCP/IPv4) and select Properites
7. Bullet Use the following IP address, and enter the IP address, Subnet Mask and Default Gateway. Select OK.
8. Select Close.

To verify that the computer has the correct IP address, Subnet Mask and Default Gateway, open a Command Line Prompt or PowerShell and enter the ipconfig command.