If you are posting a file URL or downloading a file, if you think that it may harm your computer then this is a free website that will check for any viruses or malware by you providing a file or URL.

This website will scan any FILE (20Mb limit) or URL for viruses & malware so you can be sure to be safe clicking the link you wish to visiting or downloading a file.

Link: http://www.virustotal.com/index.html

Please remember every link to a file needs to be posted with a link or screen shot of a full virus scan of all containing files.