AVG AntiVirus (formerly just AVG, abbreviation of Anti-Virus Guard) is a family of antivirus software developed by AVG Technologies , a subsidiary of Avast Software .   It is available for Windows , MacOS and Android .
The brand AVG comes from Grisoft’s first product, “Anti-Virus Guard”, launched in 1992 in Czech Republic. In 1997, the first AVG licenses were sold in Germany and UK. AVG was introduced in the US in 1998. 
The AVG Free Edition has been promoted to raise awareness of the AVG product line.  In 2006, the AVG security package grew to include anti-spyware, as AVG Technologies acquired ewido Networks , an anti-spyware group. That same year, Microsoft announced that AVG components would be directly available within the Windows Vista operating system. AVG Technologies acquired Exploit Prevention Labs (XPL) in December 2007, and incorporated that company’s LinkScanner safe search and surf technology into the AVG 8.0 security product range released in March 2008. In January 2009, AVG Technologies acquired Sana Security, a developer of identity theft prevention software. This software was incorporated into the AVG product line released in March 2009.
According to AVG Technologies, the company has more than 200 million active users worldwide, including more than 100 million who use their products and services on mobile devices. 
On July 7, 2016, Avast announced an agreement to acquire AVG for $ 1.3 billion. 
AVG provides AVG AntiVirus Free for Windows , AVG AntiVirus for Mac for macOS , and AVG AntiVirus for Android for Android devices . All are freemium products: They are free to download, install, update and use, but for technical support, a premium plan must be purchased.
AVG features most of the common functions available in modern anti-virus and Internet security programs, including periodic scans, scans of sent and emails (including posting footers to the emails), the ability to “repair” some virus-infected files , and a quarantine area (“virus vault”) in which infected files are held.
The patent pending LinkScanner technology acquired from Exploit Prevention Labs and built into most AVG products, provides real-time updated protection against exploits and drive-by downloads. LinkScanner includes: Search-Shield – a safe search component that places safety ratings next to each link in Google, Yahoo! and MSN search results; more Active Surf-Shield – a safe surfing component that makes it easy to get started.  Concerns regarding web analytics have made LinkScanner a controversial component (see below “LinkScanner Concerns”).
When AVG has been released, its LinkScanner has been shown to increase in search of web sites that appear high in search engine results pages. Since LinkScanner disguises the scans as coming from an Internet Explorer 6 browser when it prescans each site listed in the search results, web site usage logs showed incorrect and overinflated website visitor statistics. The prescanning of each link in search results also caused by the use of the Internet, resulting in the use of web site operators and slow performance for users.  AVG prime site administrators would be able to filter the link of their website, leaving the problem of excessive bandwidth use still to be solved. Pay-per-click advertising was not affected by the increase in traffic. 
AVG Online Shield
AVG Online Shield is a feature, designed to check files and ensure that they are safe. AVG Online Shield also ensures the safety of exchanging files via instant messengers and VoIP clients. 
In response to complaints, AVG announced that as of July 9, 2008 “Search-Shield will no longer be more expensive than ever”,  releasing a new build on that date that applies to local blacklist, then prefetches and scans only those links clicked on by the user. 
As of 2014, there are numerous reports dating back to 2012 that the SafeGuard Toolbar AVG installs itself without the consent of the user, as a side effect of installing other applications. The toolbar program appears to cause significant RAM issues and can be considered an intrusive potentially unwanted program (PUP). Once installed, the AVG toolbar is virtually impossible to remove. The toolbar uninstaller does not function, instead re-installing the add-on if manually removed. Consequently, many discussions and blog posts have been described as complex procedures for the removal of the AVG toolbar, each with very mixed results.      
In September 2015, AVG announced that it would start tracking users for profit, analyzing their data for sale to the advertising industry. Http://www.youtube.com/watch?v=sddddddddddcc&category&security=releases&utm_source=establish&utm_source=establish&utm_source=estate&utm_source=content&utm_source=view&utm_security=content&security=content&security=content&lang=en&product_id=2&submit=1&submit=3&security=&lang=e 
In December 2015, the “AVG Web TuneUp” Google Chrome extension (automatically installed with AVG AntiVirus) was revealed to contain multiple critical security vulnerabilities.  Most notably, Chrome users’ browsing history could be exposed to any website, cookies could be read by an attacker, and trivial cross-site scripting (XSS) code (as another domain).
The XSS vulnerability is a user’s mail from “mail.google.com” to be read by any website, or financial information to be read from the user’s online banking site. The AVG team fixes this by allowing “mysearch.avg.com” and “webtuneup.avg.com” to execute these scripts. Despite this remediation, the attackers could have found any of these attacks if an XSS vulnerability was found on the AVG sites. As of April 2016, Web TuneUp was not available for download from the AVG website.
AVG Antivirus Free 2012 was selected by PC Editors Choice Magazine in the free antivirus category.  AVG AntiVirus Free 2015 received the Editor Choice badge of SoftChamp. 
- Internet Security
- Comparison of antivirus software
- Comparison of firewalls
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- Jump up^ ” ” AVG Secure Search “is obviously a malware that attaches itself to FF.Is Mozilla working on killing it?” . Retrieved 17 December 2015 .
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- Jump up^ Completely Remove AVG
- Jump up^ Emil Protalinski. “AVG Security Toolbar is the worst foistware I’ve ever seen” . ZDNet . Retrieved 17 December 2015 .
- Jump up^ Beuth, Patrick. “Antivirensoftware benimmt sich künftig wie Spyware” . ZEIT ONLINE . Retrieved 23 September 2015 .
- Jump up^ “Issue 675: AVG:” Web TuneUP “multiple extension critical vulnerabilities” . December 15, 2015 . Retrieved 29 December 2015 .
- Jump up^ Rubenking, Neil J. “AVG Anti-Virus Free 2012 Review & Rating” . PCMag.com . Retrieved 22 November 2012 .
- Jump up^ “Download AVG AntiVirus Free” . SoftChamp.com . Retrieved 16 February 2015 .