Cannot open LO

It states “either another instance of LO is accessing my personel settings or personel settings are locked”


check procedure in answer Opening Libre office documents.

If you additionally face a crash of Windows, please check March 15, 2021—KB5001567 (OS Builds 19041.868 and 19042.868) Out-of-band which fixes a Windows Update problem mentioned in bug tdf#140952.

Hope that helps.