Avg hangs updating virus defenitions
These services sync files and folders to any computer linked to a specific account, so when someone (inadvertently or otherwise) uploads a virus-infected file to a file-sharing account, that virus gets downloaded to everyone else with access to that shared folder.Some file sharing services, such as Google Drive, scan uploaded files for viruses (although it only scans files smaller than 25MB, giving virus spreaders an easy out — they just have to make sure their virus-infected files are larger than that).They are the most common type of virus out there and the easiest to create — which also makes them the simplest to get rid of.
Boot sector viruses used to be propagated mainly via pluggable devices, like USB keys, floppy disks and CD-ROMS.
Scammers and cyber criminals use aggressive pop-ups and ads to scare users into believing that a non-existent virus has been detected in their PC, and compels them to download their “antivirus” software in order to clear the threat.
Instead of ridding the computer of viruses, this fake antivirus proceeds to infect the PC with malware, often with devastating consequences for the victim’s files, hard drive, and personal information.
You can get computer viruses through email by: Instant messaging (IM) is another means for viruses to spread.
Skype, Facebook Messenger, Windows Live Messenger and other IM services are inadvertently used to spread viruses to your contacts with infected links sent through chat messages.Wifatch which appears to do nothing other than keeping other viruses out of your router. Wifatch is itself a virus — it infects a device without its user’s consent and coordinates its actions through a peer-to-peer network — but instead of hurting you, it acts as a sort of security guard.