Hitman Pro 3 can scan a computer in only a few minutes from a USB Flash Drive, CD/DVD, local or network attached hard drive and will quickly reveal the presence of any malware using a Behavioral Scan. The actual verification of these potential malware files is then done on the Hitman Pro servers, the "Scan Cloud", which incorporates a hosted multi-vendor scanning service. Hitman Pro 3 uses 7 different anti virus programs to analyze the suspicious files.
Hitman Pro 3 can be used in addition to your existing anti virus program. Scanning your PC is free so Hitman Pro 3 is an ideal solution to check if your current anti virus program is protecting you sufficiently.
Software is a trial but you can perform one time scans indefinitely.