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Clearly something going on, or that your anti virus went full re**** mode that's my guess on this.
https://windowsreport.com/class-not-registered-windows-10/
https://blog.pcrisk.com/windows/12225-how-to-fix-class-not-registered-error
https://troubleshooter.xyz/wiki/fix-class-not-registered-error-in-windows-10/