| File Extension: | QTN |
| File Type Description: | Norman Virus Control |
| File Type Developer: | Norman |
| Primary Associated Software: | AVG Internet Security |
| Primary Software Developer: | AVG Technologies |
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Primarily, a QTN file extension is a type of Norman Virus Control file developed for the AVG Internet Security software program by AVG Technologies. User statistics infer that these QTN files are popular with users from United States and most frequently found on the Windows 10 platform. A vast majority of these users are opting to use Google Chrome as their preferred internet browser.
 | AVG Internet Security by AVG Technologies |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Android |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .BAV | Ritlabs, SRL | Plugin Files | AVG Bat! Plugin File |
| .LNS | AVG Technologies | Data Files | AVG Anti-Virus Language Data File |
| .SCI | Open Source | Data Files | Scilab Script |
| .SSY | Unknown Developer | Compressed Files | ScreenShare Compressed Data |
| .FJL | Symantec Corporation | Data Files | Rootkit.Win32.Agent.fjl Virus File |
| .XXX | BloodDolly | Encrypted Files | TeslaCrypt 3.0 Ransomware Encrypted File |
| .TIP | AVG Technologies | Uncommon Files | TuneUp Utilities Icon Package |
| .CTF | Interscape | Data Files | WhereIsIt Catalog File |
| .NLS | Uri Wilensky | Developer Files | NetLogo Source Code File |
| .ARU | Symantec Corporation | Uncommon Files | Autorun.aru Malicious Data |
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