Description: Windows 8.1 is an operating system that was produced by Microsoft and released as part of the Windows NT family of operating systems. It was released to manufacturing on August 27, 2013, and broadly released for retail sale on October 17, 2013, about a year after the retail release of its predecessor.
Format: Bootable ISO
MD5 : 955b920dfeb0be1122887a12edc82f23
NET Framework 3.5
NET Framework 4.8
August 11, 2020—KB4571723 (Security-only update)
Windows 8.1 Pro – STD
Windows 8.1 Pro – KMS
Windows 8.1 Pro – OEM
STD = Standard installation – For those with own License Key
KMS = Activated by KMS_VL_ALL
OEM (Original Equipment Manufacturer) will automatically activate original version installed by Manufacturer.