If you already have a 64-bit ISO file, you can use PowerShell to format and prep your USB drive: Open as an administrator. Identify your USB drive number using Get-Disk . Run these commands (replace X with your drive number): powershell
To download and install the 64-bit version today, you must use alternative methods to obtain the ISO and create bootable media. 1. Official ISO Download Status (2026)
For pre-built systems (laptops or desktops), you may need to contact your device manufacturer (e.g., Dell , HP, or Lenovo) to request recovery media specific to your hardware. 2. Creating Bootable Media Without the Official Tool windows 8.1 download 64 bit media creation tool
Clear-Disk -Number X -RemoveData New-Partition -DiskNumber X -UseMaximumSize -IsActive -AssignDriveLetter Format-Volume -FileSystem FAT32 -DriveLetter E Use code with caution.
Select , choose the 64-bit (x64) architecture, and select your language. If you already have a 64-bit ISO file,
Mount your ISO file and copy all contents to the USB drive letter using Copy-Item . 3. System Requirements for 64-bit Installation
Once the ISO is downloaded, Rufus will automatically configure the settings for a bootable drive. Click to burn the media. Method B: Manual Command Line (PowerShell) Creating Bootable Media Without the Official Tool Clear-Disk
Before installing, ensure your hardware meets these minimum 64-bit specifications:
Microsoft no longer provides a direct public download for the Windows 8.1 ISO on its primary software download page. Instead, users have two main legitimate paths: