| Windows 3.x | Windows Vista | Windows 10 |
| Windows 9x | Windows 7 | Windows CE |
| Windows NT | Windows 8 and 8.1 | Xbox OS |
Timeline of releases
According to Net Applications, that tracks use based on web use, Windows is the most-used operating system family for personal computers as of June 2016 with close to 90% usage share.When including both personal computers of all kinds, e.g. mobile devices, in July 2016, according to StatCounter, that also tracks use based on web use, Windows OSes accounted for 46.87% of usage share, compared to 36.48% for Android, 12.26% for iOS, and 4.81% for OS X.The below 50% usage share of Windows, also applies to developed countries, such as the US, the UK and Ireland. These numbers are easiest (monthly numbers) to find that track real use, but they may not mirror installed base or sales numbers (in recent years) of devices. Read More..
Security
Consumer versions of Windows were originally designed for ease-of-use on a single-user PC without a network connection, and did not have security features built in from the outset. However, Windows NT and its successors are designed for security (including on a network) and multi-user PCs, but were not initially designed with Internet security in mind as much, since, when it was first developed in the early 1990s, Internet use was less prevalent.
These design issues combined with programming errors (e.g. buffer overflows) and the popularity of Windows means that it is a frequent target of computer worm and viruswriters. In June 2005, Bruce Schneier's Counterpane Internet Security reported that it had seen over 1,000 new viruses and worms in the previous six months. In 2005,Kaspersky Lab found around 11,000 malicious programs—viruses, Trojans, back-doors, and exploits written for Windows.Read More..
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