Here is the list of top free online malware and virus scan services, this service uses multiple antivirus engines to scan your file or program.
NoVirusThanks – NoVirusThanks.org is a free service to scan suspicious file on your computer or suspect that a file or program you downloaded from the Internet might be malicious. This service uses multiple antivirus engines to scan your file or program.
VirusTotal – VirusTotal is another free service that analyzes suspicious files and facilitates the quick detection of viruses, worms, trojans, and all kinds of malware detected by antivirus engines. This service also uses multiple antivirus engines to scan your file or program.
Filterbit – Filterbit is another free service where you can upload files for scanning, analysis and identification by multiple antivirus engines. Filterbit facilitates rapid detection of viruses, trojans, worms and other malware that may be contained within your uploaded files.