Making A Virus:

Right Click on Desktop Then go to NEW>Shortcut and click on shortcut in there type following code or just copy past as same
shutdown -s -t 5 -c "Virus Activated"
Click Next and click finish your new virus is ready.

10x Zoom

Open Paint, then open a small image.
Select the zoom "Magnifier" tool.
Windows Paint lists out the zoom options from 1x to 8x, but there is a 10x...
After selecting the Magnifier tool, point the mouse right at the border line right under "8x" and left-click. There you go.. the hidden 10x

Create a trail image

Open Paint, then open an image.
Right-click on the image and select "Select All"
Now hold the "Shift" key and move the image around. The image will be drawn with trail