If you want to scan files online, drweb is a free tool that will allow you to scan files online. It is very simply and easy to use anybody. No sign up and download is required for using it.
To scan files simply upload files into drweb website and click â€œscanâ€ button after sometimes you will a get scan result. You can scan web URL also. All anti virus programs need updates you donâ€™t worry about updates for this.