CTRL+ALT+DEL Alternative

Tired of the four keystrokes ritual of locking your computer before leaving your workstation, Instead of CTRL+ALT+DEL and then hitting ENTER, I can now do it in a single click and here is how:

Right click an empty area on your desktop. From the Context menu, point to New and click Shortcut.
In the Create Shortcut dialog as shown in the following figure, type the following:
rundll32.exe user32.dll, LockWorkStation. Click Next.
Type in a name for the shortcut. Click Finish.
You'll now have a shortcut on your desktop that you can use to quickly lock your workstation

You can also change the shortcut's icon (my personal favorite is the padlock icon in shell32.dll).

To change the icon:
Right click the shortcut and then select Properties.
Click the Shortcut tab, and then click the Change Icon button.
In the Look for icons in this file text box, type:
Shell32.dll.
Click OK.
Select one of the icons from the list and then click OK

or simply by pressing the windows key + L , you can lock it .

Just some alternatives to the 4 keystroke lockdown process.