Watch in HD.
This is how I set up my usb printer with the airport extreme wirelessly connected to a windows computer.
1. Select Devices and Printers from the Windows Start menu
2. Click Add a Printer
3. Select the Add a local printer option (yes, it's not local, but that's Microsoft for you)
4. Click Create a new port, and select Standard TCP/IP Port from the drop-down list, and click Next
5. Fill in the Hostname or IP address with the address of your Airport Extreme router. That's probably 10.0.1.1, but you can check it by running the ipconfig command from a command prompt and looking for the Wireless LAN's Default Gateway address. Leave Port name at whatever it fills in, uncheck Query the printer and automatically select the driver to use, and click Next.
6. The wizard will say it's Detecting the TCP/IP port. It should find the device. If not, you probably entered the wrong IP address. Check it and try again. If it still fails to detect it, don't worry about it and continue anyway.
7. Select Network Print Server (1 Port -- USB) from the Standard Device Type list. The default Generic Network Card would probably work okay, but I didn't try it. Click Next.
8. Select your printer's Manufacturer from the list, then select your specific printer from the Printers list, then click Next. If your printer isn't there, you'll have to download a driver and use the Have Disk option.
9. Fill in a Printer name, or leave the name it fills in for you alone. Click Next.
10. Decide to share the printer or not. I selected Do not share this printer and clicked Next.
Decide whether to Set as the default printer, and try to Print a test page, then click Finish.
Is also close to the same for Windows 8.
