Bring back the windows 10 start menu.

Just follow the steps below:

1. ​Right click on the Start Button and select "Run"
2. Type "regedit"
3. Navigate to HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Explorer>Advance
4. Create a new DWORD (32-bit) value, call it "EnableXamlStartMenu"
5. Restart Explorer​

Found from 

http://www.winbeta.org/news/how-bring-back-old-resizable-start-menu-running-windows-10-build-9926