Quickly Fix “Setup Was Unable to Use the Existing Partition” Error

In most situations, we could install Windows smoothly since setup gives detailed instructions in each step, but there are many unexpected things happening. For example, in the Where do you want to install Windows interface, you may receive the following error message:

“Setup was unable to use the existing partition because the system volume does not contain the required free space”

To Install or Reinstall Windows to Overwrite Old System

If you plan to install or reinstall new Windows to overwrite your old system, there are 2 choices for you. One is to delete or format the system partition, and the other is to delete all contents saved in system partition.

Option One: Delete or Format System Partition
If your Windows is still bootable, please download and install MiniTool Partition Wizard, which is a free partitioning tool running on Windows platforms, to your computer.

Then, start and launch the program to get its main interface:

Images sent by author

Here, users just need to select the system reserved partition or EFI system partition, click “Delete Partition” or “Format Partition” feature from the left side, and finally click “Apply” button to make the change finally performed.

Option Two: Clear Contents Saved in System Partition

Please start Windows and open the system volume, then go to Folder Options (under different versions of Windows, name for Folder Options might be different), check “Show hidden files, folders, and drives”, uncheck “Hide protected operating system files”, and click Apply button.

After that, files saved in system partition should be visible. At this time, users only need to select all those files and delete them.

By Skylly

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