Microsoft Safety Scanner

Early 2011, Microsoft released a downloadable on-demand personal desktop security scanner to help end-users deal with malware/virus outbreaks. The tool is a small 70 Mb of self-contained security scanner package that you download and run. It's called Microsoft Safety Scanner

Microsoft Safety Scanner is not an anti-virus program. It does not replace your real time anti-virus client such as Microsoft Security Essentials. It is a tool that you can use to remove malware/virus on computers that don't have anti-virus software or where the regular anti-virus software was disabled by the malware/virus.