Just a quick note about the antivirus settings for SharePoint. You know how you have the option to scan on both upload and download? Well, here’s why you should choose to scan on both upload and download: Between the time a file is uploaded and the time it is downloaded, the server can receive virus definitions updates. If you scan on download, you can detect viruses that might have been missed on upload. You should scan on upload so you at least try to prevent infected files from entering the system.