Microsoft has issued a deadline for manufacturers to sell all devices running windows 7 and 8.1 by October 31st of 2016. After which they will only be able to sell windows 10 devices. If you prefer a windows 7 or 8.1 device, you will only be able to get it from left over stocks vendors haven????????t sold. For example, when October 31st comes around in 2016 you can only get those devices if stores like best buy or microcenter haven????????t sold them all. Windows 7 and 8.1 PC????????s have the same sell by deadline while windows 8 PC????????s have a deadline of June 30th of 2016. Normally windows 7 would have had to be sold sooner than that but since it is one of the most widely used and favorited operating systems they decided to push the deadline back. The longest time between release date and end of sales pre-installed on PC????????s was 9 years with Windows XP. Even though Microsoft is imposing a deadline to sell devices with those operating systems pre-installed they will still be offering support for the next 5 years. Windows 7 will be supported until January 14th of 2020 and windows 8 will be supported until January of 2023. Since Windows 10 is brand new, a date has not been determined for the sale of devices with it pre-installed or support of the product. If you were thinking about getting a brand new device within in the next year, I????????d recommend just going for windows 10. It????????s the best of Windows 7 and 8.1, and then some. Below is the table from Microsoft’s site With the end of support and sales dates for Windows operating systems.