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.