Windows Vista/Longhorn
Microsoft Windows Vista was released on 8th November 2006. This makes the operating system 11 years old as of 23rd October 2018. My personal opinion of Windows Vista is that In 2006, Microsoft could have done a better job on Windows Vista/Longhorn. Windows Vista has a lot of compatibility issues with software and drivers. In 2013, I used to have a Windows Vista Toshiba laptop and I had so many compatibility issues so I upgraded to Windows 7 (post on Windows 7 has been released). I'm not surprised that Windows Vista only has 2 service packs (Number 1 and Number 2). There was Vista Business, Home Basic, Enterprise, Home Premium, Starter and ultimate. I think Windows Vista is a complete fail.