Here is a list of online scanners.
Single File Online Scans
Trying to determine if one or a few files are good or bad?
Just upload your suspect file to one of these services.
Full System Online Scans
Some malware can hide from the locally installed software or, in some manner, prevent it from doing a thorough scan. So, the experts recommend running at least one full system scan from an online antivirus service. Here is a list of such scanners.
