This is a helpful tip for people who are working with their PC in their office.
You can lock your Windows PC by pressing Windows Key + L.
You can create a shortcut if you like.Here are the steps to do that.
Step 1: Right Click on Desktop.
Step 2: Navigate to New>>Shortcut
Step 3: In the text box, type
rundll32.exe user32.dll,LockWorkStationStep 4: Click Next. Enter the Name for the shortcut,and Click Finish.
Now your shortcut is created.
You Can change the icon if you want
See: How To Change Shortcut Icon.
How To Change Folder Icon.