I used to use a Yubikey with a certificate for file encryption. I then modified the encryption certificate on the key assuming I could use the backup certificate stored on a flash drive to decrypt the files. Unfortunately, Windows will only accept a smart card and not a certificate file on my computer, and so I cannot do anything to the file.

Is there a way to simply delete the file? I do not need it anymore and I'd prefer to not have it on my desktop all the time. I already tried changing the encryption certificate to the one stored on my computer, but it won't let me open it either way.

When I attempt to delete the file I get the following prompt:

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As suggested by Ramhound, I ended up booting into a live Linux environment from a USB stick and deleted the file from there.

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