If you are using a Windows 8.1 preview you will get reminded of it every second of the day, something that can get pretty annoying after a while. If you are using a preview, a small icon on the right side of your screen will appear saying any of the following lines:

• Test Mode Windows 8 Build 9200
• Test Mode Windows 8.1 Build 9490
• Test Mode Windows 8.1 Build 9600
• Test Mode Windows 8.1 Pro Build 9600
• Test Mode Windows 8.1 Enterprise Build 9600

How to remove the Windows 8.1 build 9600 watermark

1. First, open up a command prompt and type the following: bcdedit.exe -set TESTSIGNING OFF
2. restart your computer
3. The watermark should have disappeared. If it hasn’t please continue to step 4
4. Download WCP Watermark Editor
5. run the .exe file
6. Check the “Remove all watermark” option
7. Click on “Apply New Settings”
8. Reboot your computer
9. Reset your wallpaper

This should permanently remove the annoying “Test Mode” watermark on the right bottom of your screen.