Hi Lana. I'm Greg, an installation specialist, 9 year Windows MVP and Independent Advisor, here to help you.
Yes, follow this tutorial to back up Credentials Manager:
https://www.kapilarya.com/how-to-backup-and-res...
I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.
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Note: Kapil Arya is a trusted Microsoft MVP.