BAT.Billy

This spyware is a member of BAT-spywares' family; this means it usually sneaks into the computer as a BAT-file and performs its set of destructive actions. These actions are aimed at infecting many archive files, such as *.rar and *.zip. This spyware also overwrites the winstart.bat file, which is one of key computer components. The loss of this file always result in unstable computer working and other negative effects.