While Windows Vista may be a failure and runs in less than 1.5 percent of all PCs, that is still a huge number, if you consider the total PC users. The OS is rapidly nearing its 10-year life, and exactly one year from today, Microsoft is going to end support for this OS.

In an interview, former Microsoft CEO Steve Ballmer has said that his biggest regret is Windows Vista and called it his single biggest mistake in the 13 years that he was at the helm of Microsoft.

When I look at it and I say, okay, what’s the thing that I did that I feel — that I regret the most, not just in my CEOship but my whole time here, it’s absolutely ‘Longhorn becomes Vista.’ That was the single biggest mistake I made.

Most Windows Vista users are disappointed by the OS and had quickly jumped to Windows 7, when it was made available. Microsoft has already ended mainstream support for Vista back in August 2012 and has only been providing security updates for the OS since then. It did not even release a new version of Internet Explorer on Vista after version 9. This means the company will not face any problems in convincing the small minority that is still running Vista to switch to Windows 10.

So, if you are one of the very few who is running Windows Vista on their PC or know someone still using it, then bear in mind that Microsoft is going to end support for this OS on April 11th, 2017. From then on, Microsoft will not even release security updates for the OS and it is not a good idea to continue using a PC without regular security updates.