NANO Antivirus is a Russian antivirus.      The software is being developed by NANO Security Ltd. The antivirus has free  and paid (Nano Antivirus Pro) versions.
NANO Security Ltd is included in the Microsoft list of reputable security companies that provide compatible security software that is compatible with Windows OS. NANO Security products are listed as compatible with Windows 10 & Windows 8 / 8.1,  but are available for Windows XP SP3 or higher and Windows Server 2003 SP1 or higher, all in both 32-bit and 64-bit. The software is intended for home PC and small office use.  In 2017 NANO Antivirus Pro was included in Russian Software Registry of the Ministry of Telecom and Mass Communications of the Russian Federation .  
Although NANO Antivirus failed to pass the VB100 certification in the first attempt, it has since then achieved five VB100 awards. Later, it had failed to reach a pass on the latest test.  The VB100 team commended the product quality.  
NANO Antivirus is integrated into following online scanners: VirusTotal ,  OPSWAT Metadefender.com as an Engineered Supplier and certified partner,   
- Comparison of antivirus software
- Jump up^ “List of Vendors AV (PC)” . AV-Comparatives .
- Jump up^ “NANO AntiVirus 22.214.171.124639” . PC World .
- Jump up^ “NANO AntiVirus Pro . xakep.ru.
- Jump up^ “NANO Antivirus” . CNET Download .
- Jump up^ “NANO Security выпустила антивирус, полностью основанный на собственных технологиях” . KM.RU .
- Jump up^ “NANO Antivirus: Lightweight, fast, free antivirus software for Windows” . The Windows Club.
- Jump up^ “Consumer Antivirus Software Providers for Windows” . Microsoft .
- Jump up^ “The system requirements on the official site” .
- Jump up^ “Free (and Legal) Antivirus Solutions for Small Businesses” . Business News Daily.
- Jump up^ “The page of the product on the official site of the Ministry of Telecom and Mass Communications of the Russian Federation” .
- Jump up^ ” ” Nano Антивирус Pro “включен в Единый реестр российских программ” . CNews .
- Jump up^ “Virus Bulletin: VB100 results overview – NANO Antivirus” . Virus Bulletin.
- Jump up^ “Comparative VB100 Review on Windows 8.1 Pro, 64-bit, with update” . Virus Bulletin .
- Jump up^ “Comparative VB100 Review on Windows 7 Pro x64” . Virus Bulletin .
- Jump up^ VirusTotal
- Jump up^ OPSWAT Metadefender
- Jump up^ “NANO + OPSWAT” . OPSWAT .
- Jump up^ “The OPSWAT company blog” .