I have an issue that does not seem to be able to be fixed through common means. the LCU (latest cumulative updates) for windows are refusing to install. windows downloads and installs and gets to 100% before giving an 0x80070005 error. I am aware that this is an access denied error, but am unable to determine exactly WHAT action is being denied. All i know for certain, is that when the issue occurs, tiworker.exe crashes with expecting module CBScore.dll with exception 0xc0000005, which is also an access denied error. as far as i can tell, the update is failing midway, placing the updated files, or at least setting up where they should go, but then never properly finishing. as a result, dism will occasionally remove the updated files or just not find any corruption. I have tried multiple times running SFC and DISM with out any errors being found. i have run windows setup to do a repair install multitple times, and the issue persists. in an effort to try and solve the issue, thinking maybe it was a bug in windows itself or something, I installed the release preview for win 11 24H2, but was unable to install the LCU to take it beyond 26100.1 when the ISO for 26100.1150 was released, i did a repair install using that, and while the build is now 26100.1150, the LCU for 26100.1270 fails to install with the same update error. even trying to run windows setup with dynamic updates is failing to solve the issue. the best way to begin troubleshooting windows update, the windows update troubleshooter has been transitioned to the gethelp app in 24h2, but when i attempt to run the update trouble shooter i get an error saying that the 'Windows update diagnostic has failed to run.' I don't know if this is because of the issue in my system, or because the feature has a bug. I did download a copy of the older version of the troubleshooter, but it was unable to detect or fix anything. i would really like to avoid a windows reset or factory restore i can. reinstalling all my stuff is a major pain in the ass, mostly because i have a low speed DSL connection. this issue started on win 11 22H2 and followed me too 23H2 and now 24H2. i have since read that it is unwise to perform an upgrade when there is an issue like this that isn't solved by a repair install. --- OOPS. It might be possible there is an issue with the Components Registry hive, but it is doubtful, as i can load and unload the hive from within windows using the reg /load command. if i could get help examining the components hive in order to rule that out, it would be a big help.