Want to change the default Windows Tooltip colour with some cool one as shown below.

Then right click on your desktop and from a drop down menu choose properties as shown below.

This opens the windows Display properties dialog box. Now click on Appearance tab as shown below. Then right click on your desktop and from a drop down menu choose properties as shown below.

After this click on Advanced button as shown below.

This will open Advanced Appearance Dialog box. Choose Tooltip from drop down menu as shown below.

Now select any two colours of your choice as shown below and Enjoy.