Error message: OLE received a packet with an invalid header: (Exception from HRESULT: 0x80010111)

Hello all,

I got this unhelpful message and a refusal to start from my Studio 2019 SR2 [15.2.8.3007] this morning: ‘OLE received a packet with an invalid header: (Exception from HRESULT:  0x80010111)’
There were two possibly related MS updates on my Windows 11 64bit laptop this morning, one I manage to uninstall, the other one cannot be uninstalled - security update KB5029263.

I would be grateful for any ideas of what to do...

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