Windows Vista of January 2009, it had been announced that Vista usage had surpassed Microsoft's pre-launch two-year-out expectations of achieving 200 million users. At the release of Windows 7 (October 2009), Windows Vista (with approximately 400 million Internet users) was the second most widely used operating system on the Internet with an approximately 19% market share, the most widely used being Windows XP with an approximately 63% market share. In May 2010, Windows Vista's market share had an estimated range from 15% to 26%. On October 22, 2010, Microsoft ceased sales of retail copies of Windows Vista, and the OEM sales for
Comparison of Windows Vista and Windows XP low-end computer system, Windows XP outperforms Windows Vista in most tested areas. Windows OS network performance depends on the packet size and used protocol. However, in general, Windows Vista compared to Windows XP shows better network performance particularly for the medium-sized packets. Security was a top priority during Windows Vista development. In Windows XP, every user is set up as an administrator by default (unless added through Computer Management). As a result, most home users ran all their software with Administrator access. However, this left most users unwittingly open to potential security threats, such as hacking and malware downloads. A