You have been infected I repeat You have been infected and your system files has been deleted. Sorry. Have a Nice Day and bye bye…
Download to hear the voice.
This trojan cannot spread from computer to computer by itself but it spreads via email with attached files, usb drive, P2P sharing networks, etc. Once your computer get infected, it will not allow you to use files with these extension, BAT, COM, EXE and MP3 files. And it also disables Task Manager and the Windows Registry Editor.
Currently the threat level is medium. So better you update your antivirus definition now.