My Dear MOuthshut friends, i am Mohit and today I am going to review Windows 10 operating system which is the most awaited os of microsoft and also its the last os which microsoft realeased after this they will only give updates to this operating system. they launched win 10 in june 2015 and also offering free upgrade to win 10 who have registered or oem version of windows in his /her system.they are providing upgrade to win 7 and win 8.1 but feature availability may vary by devices and os.means if you have win 7 home basic and you upgrade to win 10 you will not get cortana to use.if you have 32 bit system than you have to download 1.6gb and if you have 64bit system than you have to download 2.6 gb after all required update is already installed. but main features are same and very usefull.it has auto colour change task bar now and start up take less time compare to other versions of windows.look of windows 10 is very stylish but there is also few bug.worst and annoying bug in this windows 10 is your audio switching system will not work in few systems means you are playing audio on speaker mode and when you insert earphone jack in the audio out jack still you will not get the audio via earphone.you have to change the output device in sound setting everytime.this is very bad before this it switches automatically.but after few reasearch you can rectify it. I like windows 10 for its easy operation and recommend it to everyone who have a registered version of win 7 or win 8.1.