Windows 8.1 (codenamed Blue) is an upgrade
for Windows 8, a computer operating system released by Microsoft. First unveiled
and released as a public beta in June 2013, it was released to manufacturing on August 27, 2013,
and reached general availability on October 17, 2013, almost a year after
the retail release of its p
redecessor.
Windows 8.1 is available free of charge
for retail copies of
Windows 8
and Windows RT users via
the Windows Store. Unlike service packs on previous versions of
Windows, users who obtained
Windows 8 outside of retail copies or pre-loaded installations (i.e., volume licensing) must obtain
Windows 8.1 through new installation media from
their respective subscription or enterprise channel. Microsoft's support lifecycle policy treats
Windows 8.1 similar to previous service packs of
Windows: It is
part of
Windows 8's support lifecycle,
and installing
Windows 8.1 is requi
red to maintain access to support
and Windows updates after January 12, 2016. However, unlike previous service packs,
Windows 8.1 cannot be acqui
red via
Windows Update.
โหลด Windows 8.1 Pro x86 x64