Qground Control not responding

Im my Laptop Qground controll app is not opening. Few days ago it was fine. But suddenly it is not opening. So, I try reinstall it. But the result is same.
My PC is 32bit Windows 7, 8gb ram with 500gb space.
What is the issue with it?
Thanks in advance.

Can you try to search for anything named QGroundControl such as save and config files and remove these?