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  2. Windows 7 editions - Wikipedia

    en.wikipedia.org/wiki/Windows_7_editions

    The main editions also can take the form of one of the following special editions: N and KN editions The features in the N and KN Editions are the same as their equivalent full versions, but do not include Windows Media Player or other Windows Media-related technologies, such as Windows Media Center and Windows DVD Maker due to limitations set by the European Union and South Korea ...

  3. Microsoft Product Activation - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Product_Activation

    In this case, the copy of Windows installed does not use the product key listed on the certificate of authenticity, but rather a master product key issued to OEMs called a System Locked Pre-installation (SLP) key. On each boot, Windows confirms the presence of specific information stored in the BIOS by the manufacturer, ensuring the activation ...

  4. Windows 10 - Wikipedia

    en.wikipedia.org/wiki/Windows_10

    On May 2, 2017, Microsoft unveiled Windows 10 S (referred to in leaks as Windows 10 Cloud), a feature-limited edition of Windows 10 which was designed primarily for devices in the education market (competing, in particular, with ChromeOS netbooks), such as the Surface Laptop that Microsoft also unveiled at this time. The OS restricts software ...

  5. Windows 7 - Wikipedia

    en.wikipedia.org/wiki/Windows_7

    Maximum PC gave Windows 7 a rating of 9 out of 10 and called Windows 7 a "massive leap forward" in usability and security, and praised the new Taskbar as "worth the price of admission alone." [178] PC World called Windows 7 a "worthy successor" to Windows XP and said that speed benchmarks showed Windows 7 to be slightly faster than Windows ...

  6. Product key - Wikipedia

    en.wikipedia.org/wiki/Product_key

    The 25 characters of the Product Key form a base-24 encoding of the binary representation of the Product Key. The Product Key is a multi-precision integer of roughly 115 bits, which is stored in little endian byte order in an array of 15 bytes. Of these 15 bytes the least significant four bytes contain the Raw Product Key in little endian byte ...

  7. Performance per watt - Wikipedia

    en.wikipedia.org/wiki/Performance_per_watt

    In computing, performance per watt is a measure of the energy efficiency of a particular computer architecture or computer hardware.Literally, it measures the rate of computation that can be delivered by a computer for every watt of power consumed.

  8. 80 Plus - Wikipedia

    en.wikipedia.org/wiki/80_Plus

    For a given power supply, efficiency varies depending on how much power is being delivered. Supplies are typically most efficient at between half and three-quarters load, much less efficient at low load, and somewhat less efficient at maximum load. Older ATX power supplies were typically 60% to 75% efficient. To qualify for 80 Plus, a power ...

  9. PC power management - Wikipedia

    en.wikipedia.org/wiki/PC_power_management

    The Windows power management system is based upon an idle timer. If the computer is idle for longer than the pre-set time, then the PC may be configured to sleep or ' hibernate '. Windows uses a combination of user activity and CPU activity to determine when the computer is idle.