The free Windows Media Creation Tool from Microsoft grants you the power to create your own bootable Windows 10 backup, but you have to find and download it first.

If you want to convert an Apple Disk Image (DMG) file to ISO format on Windows PC, you can use the command prompt or free AnyToISO tool.

I recommend an ISO file because it will download the entire version of Windows 10 directly to your computer. I would recommend downloading the single file to your Desktop, for easy access.

Microsoft no longer supports Windows 8.1. If you're still running it on your PC, you're long overdue for an upgrade.

Windows 10 Windows 11 Step 1: On the appropriate Windows ISO download web page, look for the header that says "Create Windows installation media" and click on the Download now button.