Presentation on theme: "Viruses & Spyware A Module of the CYC Course – Computer Security 8-28-10."— Presentation transcript:
Viruses & Spyware A Module of the CYC Course – Computer Security
Malware Viruses and spyware are often referred to as malware, short for malicious software. Malicious = vicious or mischievous A virus uses your computer as it likes. It can interfere with your computer use. It can damage files or software. Spyware uses your information. It can interfere with your computer use. It can steal your personal information.
Purpose Why would someone create a computer virus or spyware? – Vandalism – Money
Bogus Link Example Why should you not trust a message such as the one below, even if it comes from a friend?
Bogus Chat Message This one is trickier. Why not trust these chat messages?
How Viruses & Spyware Spread User clicks on an attachment that downloads a virus or spyware. User clicks on downloadable file on a website that downloads a virus or spyware. User clicks on link in an , on a website or on a social network. The link takes user to a website that attacks browser and forces virus or spyware download.
Symptoms Homepage changes (and you did not change it!) A lot of pop-up windows you cannot stop. Unexpected toolbars show up. Redirected to sites you did not request. Search results are provided by a different search engine than you used. Browser continues to crash inexplicably. Files disappear (because they have been erased.) Computer shuts down inexplicably. Computer extremely slow. A lot more junk being received.
Prevention Tips Keep all your operating system and all software updated. Most virus and spyware attacks occur through security holes in popular software applications. For your browser, use Firefox, Chrome or Safari rather than Internet Explorer (IE). Because IE is so popular, virus and spyware creators target security holes in IE. Dont click on any pop ups or ads offering you anything for free.
Free Anti-Virus & Spyware Software Use an anti-virus software that scans as files are downloaded. Do not use more than one anti-virus software that runs in real time. Recommended - AVG Free Anti-VirusAVG Free Anti-Virus Use a spyware software that scans periodically. Recommended - Spybot Search & Destroy and MalwarebytesSpybot Search & DestroyMalwarebytes
Additional Resources How Computer Viruses Work How Spyware Works
11 Creative Commons License This module was created by Connect Your Community, a project of OneCommunity, funded by the federal Broadband Technology Opportunities Program.OneCommunityBroadband Technology Opportunities Program This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit