I am in the Insider/beta program, and all has gone well until this week - when 22635.3646 won't install on either computer running 2263.3640 from last week. Both are running Parallels 19.3.1, and now 19.4 It has failed several times. The last time - I Powered down, started up Windows. It was on Downloading, but quickly went to installing - must have been using a previously downloaded version. It said pending restart, I clicked the restart button. The black screen got to 30%, then it restarted again. It then said "Preparing Automatic Repairs", then "Diagnosing your PC", then "Attempting Repairs", then it said "Something didn't go as planned, don't worry we are undoing the changes." It then reboots to my current ver of Windows 22635.3640. So I tried using the UUP Dump/iso download to install on one of the computers, that failed too. It said 0xC1900101 - 0x20017, "The installation failed in the SAFE_OS phase with an error during BOOT operation." That appears to be about an incompatible driver, I didn't see any changes related to that in the .3636 release notes. Nor, has anything changed in the hardware/software configuration of either computer in a long time.
See other thread here: https://forum.parallels.com/threads...eview-10-0-22635-3646-kb5037858-fails.364166/
