Microsoft Windows, wanda aka fi sani da Windows, rukuni ne na iyalai masu tsarin sarrafa hoto, wadanda duk Microsoft ke haɓaka kuma suna tallata su. Kowane iyali suna biyan takamaiman sashin masana'antar sarrafa kwamfuta. Iyalan Microsoft Windows masu aiki sun haɗa da Windows NT da Windows IoT; waɗannan na iya haɗawa da ƙananan iyalai, (misali Window's Server ko Windows Embedded Compact) (Windows CE). Iyalan Microsoft Windows da suka lalace sun haɗa da Windows 9x, Windows Mobile, da Windows Phone. Microsoft ya gabatar da yanayin aiki mai suna Windows a ranar 20 ga watan Nuwamba, shekara ta alif 1985, a matsayin harsashin tsarin aiki na hoto don MS-DOS a matsayin martani ga karuwar sha’awar abubuwan da ke amfani da masu zane (GUIs). Microsoft Windows ya mamaye kasuwar komputa ta duniya tare da sama da kashi 90% na kasuwar, ya wuce Mac OS, wanda aka gabatar dashi a shekarar alif 1984, yayin da Microsoft a shekarar 2020, ya rasa ikonsa na kasuwar tsarin sarrafa kayan masarufi, tare da Windows har zuwa 30%, ƙasa da kashi 31% na wayoyin hannu na Apple kawai (65% na tsarin aiki na tebur kawai, watau "PCs" da Apple na kashi 28% na tebur) a cikin kasuwannin gidansa, Amurka, da 32% a duniya