As a best practice, make sure you fully re-format your drive before creating a Windows installer, and that the drive is partitioned according to the OS version you plan to put on it. The May 2019 update is about 4.6 GB no surprises there because Windows 10 is known for coming with a lot of bloatware that people don’t always need.Ĭorrupted Flash Drive – If your USB stick is corrupted, that could also lead to the burned ISO file not working as it should.

Inadequate Space on your USB – If you’re creating an installer for the 64-bit version of Windows 10, as an example, you’ll need at least 6 GB of space on your USB. You can use Microsoft’s own Media Creation Tool for this, or you can choose a more dependable option that has a much higher burn success rate. Creating a bootable USB requires a disk authoring utility. Wrong Type of Writing Software – Unless you’re using an authoring tool that’s specifically designed to create bootable media like Windows Media Creation Tool, you’re wasting your time. After all, it doesn’t matter if you have the most expensive or sophisticated ISO burner in the world if the source file is corrupt or damaged in any way, right? So do a checksum to see if the file components are as they should be. That’s why experts recommend that you always do a hash check for your ISOs before attempting to burn media or create a bootable installer no matter whether it’s on USB or a physical disk. Invalid ISO File – The most common reason ISO files fail to burn properly is because of the files themselves.

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