Disable New Network Flyout UI and Restore Previous UI
1. In Registry Editor, go to following key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Control Panel\Settings\Network
2. Now take ownership of Network key with the help of this guide.
3. Now in right-side pane, change the value of DWORD ReplaceVan to as following:
0 - Default flyout
1 - To open Network Settings window
2 - To show Windows 8/8.1 style Network sidebar