Windows 8.1 RT

Overview

Windows RT 8.1 is the ARM‑based update to the original Windows RT platform, designed for tablets and lightweight mobile devices. It refined the Windows RT experience with improved performance, better Modern UI integration, enhanced multitasking, and updated built‑in apps. Like Windows RT, it could only run Windows Store applications and built‑in Microsoft software, maintaining a locked‑down, mobile‑optimized environment focused on battery life, security, and simplicity.

Release Information

  • Release year: 2013
  • Type: ARM‑based mobile/tablet OS
  • Platform: Windows NT 6.3 kernel (ARM architecture)
  • Last update: Windows RT 8.1 Update 3 (2015)
  • Predecessor: Windows RT
  • Successor: None (platform discontinued)

Build and Distribution

  • Preinstalled exclusively on ARM‑based tablets (Surface RT, Surface 2, OEM tablets).
  • Distributed as a free upgrade from Windows RT via Windows Store.
  • Included Office Home & Student 2013 RT.
  • Could not install traditional desktop applications.

System Requirements

Minimum Hardware

  • CPU: ARMv7‑compatible processor (NVIDIA Tegra 3/4, Qualcomm Snapdragon)
  • RAM: 2 GB typical
  • Storage: 32 GB or 64 GB flash storage
  • Graphics: ARM‑integrated GPU with DirectX support
  • Display: 1024×768 minimum for Modern UI apps

Recommended Hardware (2013–2016)

  • CPU: Tegra 4 or Snapdragon S4+
  • RAM: 2–4 GB
  • Storage: 64 GB flash storage
  • Graphics: DirectX‑capable ARM GPU

Supported CPU Architectures

  • ARM: ARMv7 only

Supported Components

Graphics Cards

  • NVIDIA Tegra 3/4 integrated GPUs
  • Qualcomm Adreno GPUs (OEM‑dependent)
  • ARM Mali GPUs (OEM‑dependent)

Sound

Windows RT 8.1 supported ARM‑based audio chipsets with full multimedia playback, VoIP support, and integrated tablet audio hardware.

Input Devices

  • Multi‑touch screens
  • Touch covers and type covers (Surface RT/2)
  • USB mice and keyboards
  • Bluetooth keyboards and mice

Storage

  • Flash storage (eMMC)
  • microSD/microSDXC cards
  • USB 2.0/3.0 external storage

File System Support

Windows RT 8.1 supported FAT32, NTFS, and exFAT, with NTFS used internally for system partitions.

Supported File Systems

  • FAT32: Removable media
  • NTFS: Internal storage and external drives
  • exFAT: Flash‑drive optimized file system

Limits

  • No support for installing Win32 desktop applications
  • Desktop mode limited to built‑in Microsoft apps
  • Drivers limited to ARM‑compiled versions only

Major Features

Windows RT 8.1 focused on mobility, security, and long battery life, offering a locked‑down environment similar to mobile operating systems while retaining the Windows interface.

Key Additions

  • Office Home & Student 2013 RT included
  • Start button restored
  • Improved app snapping and multitasking
  • Enhanced Modern UI customization
  • Secure Boot enforced
  • BitLocker device encryption (automatic on supported hardware)
  • Connected Standby (instant‑on power mode)
  • Updated built‑in apps and Windows Store improvements

Networking

Windows RT 8.1 offered strong wireless networking capabilities optimized for mobile and tablet usage.

Built‑In Networking Features

  • Wi‑Fi with WPA2 support
  • Bluetooth 4.0 (device‑dependent)
  • Remote Desktop client (no host mode)
  • Workplace Join
  • VPN support

Supported Protocols

  • TCP/IP
  • IPv6
  • IPsec

Supported Network Cards

  • ARM‑integrated Wi‑Fi chipsets
  • Broadcom/Qualcomm Wi‑Fi modules (OEM‑dependent)

Driver Information

Driver Sources (2013–2016)

  • Windows Update
  • OEM‑provided firmware updates

Driver Notes

  • Only ARM‑compiled drivers were supported.
  • No compatibility with traditional Windows drivers.
  • Firmware updates were device‑specific.

Updates & Patches

Windows RT 8.1 received Windows RT 8.1 Update 3, which added the Start menu and improved usability. Support remained limited compared to x86 Windows editions.

Related Versions

  • Windows RT: Original ARM release
  • Windows 8.1: x86/x64 consumer edition
  • Windows 8.1 Pro: Professional edition
  • Windows 8.1 Enterprise: Corporate edition

Installation Notes

Installation Media

  • Preinstalled only; no retail installation media
  • Recovery partitions included on devices
  • USB recovery images provided by OEMs

Typical Installation Steps (Device Recovery)

  1. Boot into recovery mode.
  2. Choose reset or refresh option.
  3. Reinstall system image from recovery partition or USB.

Virtual Machine Notes

Windows RT 8.1 cannot run in standard virtual machines due to ARM architecture requirements.

  • No Hyper‑V support
  • No VMware/VirtualBox support
  • Only runs on ARM hardware

Known Issues & Fixes

Common Issues

  • Inability to install desktop applications
  • Limited app availability in Windows Store
  • Performance issues on early ARM hardware
  • Driver limitations due to ARM‑only support

Stability Notes

  • Generally stable due to locked‑down environment
  • Performance improved with Windows RT 8.1
  • Battery life remained a major strength

End of Support

  • Mainstream support ended in 2018; extended support ended in 2023.
  • No successor; platform discontinued.

Retro PC Tips

Best Hardware to Run Windows RT 8.1

  • Surface RT
  • Surface 2
  • ARM‑based OEM tablets (Samsung, ASUS, Dell)

Keeping It Stable

  • Install Windows RT 8.1 Update 3.
  • Keep firmware updated via Windows Update.
  • Avoid unsupported sideloading modifications.

Running on Modern Hardware

  • Cannot be installed on modern PCs.
  • Only usable on original ARM tablets.
  • Best preserved as a historical mobile Windows platform.