Step-by-step guide

1. Unplug the USB cable from the printer. (If there are multiple printers plugged in, unplug them all.)
2. Hold down Windows key, tap R key, release Windows key. NOTE: If this does nothing, login as user "mp" - click here for instructions
   
   

   

3. Type in "control printers" (without quotes).

   
   

   
   

   

   
   

   
   

   
   

   
   

4. Click "OK"
   

   

   
   
5. Right-click on a printer. (Long-press on touchscreen)
   

   

   
   
6. Click/tap "Remove device"
   

   

   
   
7. Enter the MP username/password if prompted (won't happen if you're logged in as MP)
8. Repeat step numbers 5-7 for ALL printers.
9. Plug in the USB cable to the printer you want to use.
10. Confirm the printer automatically adds itself within 1 minute, and shows up in the Printers window.
    

    

    
    
11. Right-click (or long-press) the newly-added printer, and select "set as default" (if it's not already selected)
    

    

    
    
12. If you get a pop-up, click OK:
    
    
    
13. Reboot the computer and try checkpoint printing again.