Lock Your Computer

To create a shortcut on your desktop to lock your computer:

>Right-click the desktop.
>Point to New, and then click Shortcut.
>The Create Shortcut Wizard opens. In the text box, type the following:
rundll32.exe user32.dll,LockWorkStation

>Click Next.
Enter a name for the shortcut. You can call it "Lock Workstation" or choose any name you like.
Click Finish.

You can also change the shortcut's icon
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

Tracing a website using a command prompt

Tracing or Routing a website using command prompt. This tip is only meant for educational purpose. I mainly use this trick to find out the hosting provider where a particular domain is hosted.
Follow the below steps:
1.   Start->Run->CMD  ie; open Command prompt
2.  Type the following command and press enter.
tracert www.websitename.com

in the above command, enter the desired website name.
Once you press enter, it tell you where a particular domain is hosted, Location, Country and some details of that domain.

Disclaimer: I am not responsible for this trick if this is used in a wrong way. I didn’t invent this method rather I myself found it somewhere else. Do not use this for Hacking purpose.