To add a printer in Windows 7, perform the steps detailed below:

1. Open Control Panel
2. Locate and click Devices and Printers
3. Click Add a printer located at the top
4. There will be two options in the Add Printer dialog box: Add a local printer and Add a network, wireless, or Bluetooth printer. Select an appropriate option.
5. If you’ve selected Add a local printer, perform the following steps: Specify the printer port you are going to use, and then click the Next button. Then select the model number and printer manufacturer
6. If you’ve selected the network, wireless, or Bluetooth printer option, Windows will automatically list all printers installed on your computer. If the printer that you are looking is listed in this list, select it, click Next twice, and then click the Finish button (if you wish, you can print a test page).
7. If the printer that you are looking for is not listed, click The printer that I want wasn’t listed, and then add the printer using its hostname, IP address, name. Click Next twice after you’ve added the desired printer, and then click the Finish button

Whether you are using one printer or multiple printers, remember to update its Drivers regularly. Otherwise, your printer may not work properly. You can automatically update printer drivers using an efficient driver update tool.