No, it didn’t work. Even when I have removed and reinstalled ubuntu and root.
Ok, too bad – this being a WSL problem not specific to ROOT, you might have better luck on other forums 
So you installed XMing on Windows, started it, followed these instructions and nothing works? Then I don’t know what else to suggest…
Wait, now the xclock is working somehow. The TBrowser almost works, it’s only open for one second before it’s close again.
How do you open it? What happens if you just start root from the terminal and then type new TBrowser() in the ROOT prompt?
Now it’s working after I have uninstalled root and Ubuntu, and then reinstalled it again. It worked when I added export DISPLAY=localhost:0.0 to the .bashrc file. Somehow this didn’t work before I uninstalled root and Ubuntu. Thanks for the help