Windows 7 Tips
Screen Lock
Use Win+L keyboard shortcut
OR
Create a shortcut in desktop
enter rundll32.exe user32.dll,LockWorkStation
enter rundll32.exe user32.dll,LockWorkStation
Click Next, name the shortcut ‘Lock’, and Finish.
Shortcut to Run Program as Administrator
Hold Ctrl+Shift and Click on a icon to run the application as an Administrator with full rights.