#2 Crapware

Windows 8 is still acts as a delivery vehicles for trialware and mediocre, performance-sapping Windows desktop programs. Most of the default file associations had been assigned to alternative programs that nag for registration fees.

#1 Incredibly bad branding decisions

Though Windows 8 is a good branding name, especially since it is successor to popular Windows 7 but it was Microsoft’s last-minute decision to abandon ‘Metro’ as the name for the new OS which indeed has ‘Metro UI’ and which would have been easy for users to call it that way. And then there was WinRT versus Windows RT debacle, where one is a set of APIs, the other is a product name.

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