Using Command Prompt (Win +R), to find your Dell service tag:
- Navigate to the Command Prompt Window in your computer.
- For a tablet, on the Windows Tile Screen, swipe from bottom and click All Apps.
- Scroll to the right till you get to Command Prompt.
- On the Command Prompt window, type wmic bios get serialnumber.
- For a tablet, use the onscreen keyboard to input the command.
- Hit enter.
- Your Dell Service Tag would be displayed.