How to make a laptop with non-fixed IP to a fixed IP?

the term you're looking for is static IP, and you do this by going into your control panel, going into network connections, right click on your local area connection, highlight internet protocol (tcp/ip) click on properties, and enter it there. Most ISP's however, ign your IP address DHCP, meaning they tell your PC which one you need to use, and chances are if you ign yourself an IP, when they issue it to someone else, yours will not work.