Reception

A Gartner research report predicted that Vista business adoption in 2008 would overtake that of XP during the same time frame (21.3% vs. 16.9%) while IDC had indicated that the launch of Windows Server 2008 served as a catalyst for the stronger adoption rates. As of January 2009, Forrester Research had indicated that almost one third of North American and European corporations had started deploying Vista. At a May 2009 conference, a Microsoft Vice President said "Adoption and deployment of Windows Vista has been slightly ahead of where we had been with XP" for big businesses.

In its first year of availability, PC World rated it as the biggest tech disappointment of 2007, and it was rated by InfoWorld as No. 2 of Tech's all-time 25 flops. The internet-usage market share for Windows Vista after two years of availability, in January 2009, was 20.61%. This figure combined with World Internet Users and Population Stats yielded a user base of roughly 330 million, which exceeded Microsoft's two-year post launch expectations by 130 million. The internet user base reached before the release of its successor (Windows 7) was roughly 400 million according to the same statistical sources.

Within its first month, 20 million copies of Vista were sold, double the amount of Windows XP sales within its first month in October 2001, five years earlier. Shortly after however, due to Vista's relatively low adoption rates and continued demand for Windows XP, Microsoft decided to sell Windows XP until June 30, 2008, instead of the previously planned date of January 31, 2008. There were reports of Vista users "downgrading" their operating systems, as well as reports of businesses planning to skip Vista. A study conducted by ChangeWave in March 2008 showed that the percentage of corporate users who were "very satisfied" with Vista was dramatically lower than other operating systems, with Vista at 8%, compared to the 40% who said they were "very satisfied" with Windows XP.

Amid the negative reviews and reception, there were also positive reviews of Vista, most notably among PC gamers and the advantages brought about with DirectX 10, which allowed for better gaming performance and more realistic graphics, as well as support for many new capabilities brought about in new video cards and GPUs. However, many DirectX 9 games initially showed a drop in frame rate compared to that experienced in Windows XP. Though in mid-2008, benchmarks suggested that Vista SP1 was on par with (or better than) Windows XP in terms of game performance. Around the release of Windows 7 in October 2009, a survey by Valve Corporation indicated that 40.41% of gamers were running DirectX 10 systems. The survey also indicated that DirectX 10 was supported on 83.21% of DirectX10 capable OSs (Windows Vista, Windows 7 beta and Windows 7 represented 48.56% of the survey) and that 42.27% of these OSs were 64-bit.