Use the Windows 7 USB/DVD Download Tool (which works for Windows 8.1) or a third-party tool like Rufus.
Follow the on-screen instructions. Select your language, time, and keyboard preferences. download windows 8.1 disc image -iso file- - microsoft
Windows will copy files and restart several times. Follow the prompts to set up your user account and preferences. Important Safety Note Use the Windows 7 USB/DVD Download Tool (which
Scroll down to the Select edition dropdown menu. Choose "Windows 8.1" and click Confirm . download windows 8.1 disc image -iso file- - microsoft
Before starting the download, ensure you have the following ready to avoid interruptions:
Open the tool, click Browse , and select the Windows 8.1 ISO file you just downloaded. Choose Media Type: Select USB device .