olemus
omanduslik operatsioonisüsteem firmalt Microsoft
- põhineb graafilisel kasutajaliidesel
- algselt graafilise kestana opsüsteemile MS-DOS, 1985
- määratud eeskätt personaalarvutitele (üle 90%),
------ hiljem ka mobiil- jm seadmetele

täpsemalt
https://www.youtube.com/watch?v=UuBNj6I_N3U

http://www.computerhope.com/history/windows.htm

http://www.webopedia.com/DidYouKnow/Hardware_Software/history_of_microsoft_windows_operating_system.html

veebisait
https://www.microsoft.com/en-us/windows

turvalisus
http://www.infoworld.com/article/3044089/security/the-best-new-security-features-of-windows-10.html

https://www.microsoft.com/en-us/windowsforbusiness/windows-security

https://www.microsoft.com/hk/security/

https://www.zdnet.com/article/researcher-finds-simple-way-of-backdooring-windows-pcs-and-nobody-notices-for-ten-months/

https://www.statista.com/statistics/221506/share-of-new-types-of-malware/

https://www.av-test.org/fileadmin/pdf/publications/security_report/AV-TEST_Security_Report_2015-2016.pdf

https://www.howtogeek.com/141944/htg-explains-why-windows-has-the-most-viruses/