Before updating from 18362.325 x64 to 18363.327 x64 I did a cleanup and had no problem updating. For me thr error happens for the first time when trying to update from 18363.327 to 18363.329. I'll try again to update without the cleanup.
as already mentioned /told, didn't performed any cleanup manually. so anything to bypass this error? or no solution AON?
If I'm not mistaken, UUPDump runs elevated using NSudo so to delete the MountUUP folder you would probably need to do the same.
Open an elevated command prompt and type EXPAND -F:*.* xxx.cab C:\TEMP (where xxx.cab is the name of the CU file in cabinet format and C:\TEMP is the destination path), then unzip the 7z file attached above and type DISM /Online /Add-Package /PackagePath:C:\TEMP\Update.mum (if C:\TEMP is an example of the directory with all files extracted before).
18362.329.1.11 SSU/CU appeared on Catalog: https://forums.mydigitallife.net/threads/windows-10-hotfix-repository.57050/page-446#post-1544495
Added the new SSU too (previously in RP Ring, now on catalog): 18362.323.1.0 added to https://forums.mydigitallife.net/threads/windows-10-hotfix-repository.57050/page-446#post-1544495