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#21
Next will come the option to delete existing partitions.
If your installation is UEFI you should delete 4 partitions.
If it's MBR that will probably be 2 or perhaps 3.
It's important to get this right.
If you have any data partitions on the same disk which you created, you can keep those.
If you haven't already checked your disk, do that when the installation is complete.
If your disk is ok, great. If not, installing Windows will have been nothing more than a practice exercise.