It restarts the affected computer when it is run and is programmed to restart it every three hours as well. It disables several functions from the Windows Explorer, and prevents certain programs from being run, such as the Windows Registry Editor and the Task Manager, among other actions. It does not spread automatically by its own means.

Windows 2003/XP/2000/NT/ME/98/95

ShotOne.A is a Trojan that restarts the affected computer when it is run and is programmed to restart it every three hours as well.

On the one hand, it disables several functions from the Windows Explorer, the Start button and the context menus, among others. It prevents Windows updates from being carried out and the system configuration from being saved.

On the other, it prevents certain programs from being run, such as the Windows Registry Editor and the Task Manager, among others.

ShotOne.A does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, email messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.

ShotOne.A is easy to recognize once it has affected the computer, as when it is run, it carries out the following process:
- It displays several screens belonging to a fake antivirus program.
- It runs Pinball.
- It opens several Internet Explorer and Firefox websites.
- It opens several MS-DOS windows.
- It displays a message warning that the computer is going to be restarted with a countdown.
- It restarts the computer.

In order to understand better the process ShotOne.A follows, an explanatory video is at your disposal.