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Windows 8.1 64-bit uses the NT 6.3 kernel, supporting up to 128 GB of RAM (or more depending on edition). It includes User Account Control (UAC), Windows Defender, and ASLR (Address Space Layout Randomization). 64-bit applications, such as WinRAR x64, benefit from larger virtual address spaces and faster processing of large files. winrar windows 8.1 64 bit
: Includes advanced tools such as damaged archive repair, multi-volume splitting (to fit archives across several disks), and a built-in virus scanner to check files before extraction. RAR5 Format : Windows 8
WinRAR, Windows 8.1, 64-bit, file compression, archive management, software compatibility. such as WinRAR x64