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Hi there,
I have the same problem here:
- I had 4.21 running fine
- Windows Update KB4569745 and KB4566782 installed
- 4.21 still fine running
- Calibre 4.22 tried to install - rollback of the installation at about 3/4 of the installation
- reboot: same result
- deinstallation of 4.21 + reboot
- new installation of 4.22: same result: roll back no install
- shi......
what can I do??
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