Antivirus Dr.Web Antivirus provides multi-layered defense system memory, hard drives and removable storage devices from viruses, rootkits, trojans, spyware, adware, hacking tools and various malicious objects from any external sources. Mail Monitor SpIDer Mail - performs a virus scan before entering the message in the mailbox. Thus there is a check of all components of the letter: the body, attachments, attachments in the archives.