Windows 10 is next version of Windows operating system from Windows NT family. Technical preview of windows 10 was launched in middle of October. Just after its releasing there are so many bugs and issues found in this operating system.
One issue is related to its start button. Many users complained that start menu button not works in new version of Windows 10. After installing or upgrading the Windows 10 Technical preview, Windows start button failed to launch.
According to latest discussions on Microsoft technical forum it is now known issue and solution of this issue is found. There is a registry key fix for this issue. You add one new Dword value in your registry and restart your computer, and this issue will be solved.
In few cases this got fix by simply restarting the current running explorer process from task manager. Latest windows update has automatically fixed this issue. But if your problem still persist than you can apply below method.
Follow following steps :
1. Go to run (Windows + r)
2. type regedit and press enter.
3. click ok when notification window prompt.
4. Go to HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Explorer>Advance
5. Create a Dword with name ‘EnableXamlStartMenu’.
6. Give it value 0
7. Log off and login again.
Your start menu should work now.