To update the firmware, do the following:

1. Turn the printer on and connect your computer to the printer using a USB cable.
2. Download Firmware Update Tool from the [Downloads] section of this website.
3. Extract the files from the downloaded ZIP archive, and then double-click "PtTrExp.exe" to install the tool.
4. Click the [Transfer] button.
   
5. When the following error message appears, click [OK].
   
6. Click the [Transfer] button again.
   
7. When the following error message appears, click [OK].
   
8. Click the [Transfer] button again, and this time the firmware update will be completed.
   
    

If the above steps do not resolve the issue, do the following:
 

1. Turn the printer off. 
2. Press and hold down the following keys/buttons to turn the printer on in Transfer mode. 
   <PT-D410/D450/D600/E500/H500>
   Press and hold down the [Preview] key and the [Power] key until the printer turns on.
   <PT-P700>
   Press and hold down the [Editor Lite] button and the [Power] button for more than 5 seconds until the printer turns on. 
3. Connect your computer to the printer using a USB cable.
4. Download Firmware Update Tool from the [Downloads] section of this website.
5. Extract the files from the downloaded ZIP archive, and then double-click "PtTrExp.exe" to install the tool.
6. Click the [Transfer] button to update the firmware.