How to Lock your PC with simple Command Trick?

Most of the Computer users know about ‘How to Lock PC by using User Accounts settings or with Bios Setting password? If users feels uncomfortable to leave their PC if its office system and don’t want to use other person. Then use this command trick to lock PC before you leave your PC as
Windows Key +L
If anyone tries to run your PC it ask to enter password, they cannot run your PC unless they enter right password.