FWIW I just did an install alongside with UEFI and secure boot. Admittedly the first OS was another Lubuntu and not Windows, but still, it's not clear what conditions are necessary to reproduce this nor what the exact symptoms are.
FWIW I just did an install alongside with UEFI and secure boot. Admittedly the first OS was another Lubuntu and not Windows, but still, it's not clear what conditions are necessary to reproduce this nor what the exact symptoms are.