On my computers, my Profiles Directory is set to my D: Drive and Windows is installed on the C: Drive. Every time I try to install the new launcher on one of two PC's, I get the following via launcher_log.txt
[Info: 2021-11-04 08:52:12.3916744: NetQueue.cpp(428)] NetQueue: Primary ip: 13.249.134.129, Host: launcher.mojang.com
[Info: 2021-11-04 08:52:12.3917224: NetQueue.cpp(504)] NetQueue: Action finished: https://launcher.mojang.com/v1/objects/9c2347683d56b04241670887370e79e19712d1e8/libcef.dll
[Info: 2021-11-04 08:52:12.3919326: NetQueue.cpp(532)] NetQueue: Action finalized: https://launcher.mojang.com/v1/objects/9c2347683d56b04241670887370e79e19712d1e8/libcef.dll
[Info: 2021-11-04 08:52:12.3922138: PistonUpdate.cpp(746)] Mkdir(C:\...\locales)
[Info: 2021-11-04 08:52:12.3925226: PistonUpdate.cpp(746)] Mkdir(C:\...\swiftshader)
[Info: 2021-11-04 08:52:12.3928593: PistonUpdate.cpp(767)] CopyFile(D:\...\8f157cc1ab1c18bf47305543b149604797cd6587, C:\...\cef.pak)
[Error: 2021-11-04 08:52:12.3952580: PistonUpdate.cpp(810)] Update failed for: /:\...\cef.pak, Error: The system cannot move the file to a different disk drive.
[Error: 2021-11-04 08:52:14.0539907: main.cpp(119)] Updating common component failed!
[Info: 2021-11-04 08:52:14.0553592: NetQueue.cpp(585)] NetQueue: Starting net action https://sentry.io/api/2705241/store/
[Info: 2021-11-04 08:52:14.0573980: NetQueue.cpp(183)] NetQueue: Initiating shutdown.
[Info: 2021-11-04 08:52:14.0574468: NetQueue.cpp(197)] NetQueue: Waiting for worker thread to finish...
[Info: 2021-11-04 08:52:14.0574837: NetQueue.cpp(689)] NetQueue: Worker thread shutting down.
[Info: 2021-11-04 08:52:14.0586503: NetQueue.cpp(200)] NetQueue: Done.It seems that for whatever reason, the installer is unable to move a required file from the D: Drive (User Profile) to C: Drive (Windows).
Having same issues with user profile folder not on C drive.
Also, try to install the launcher on C is also not working.
Try to get the access of C:\Program Files\WindowsApps but not helpful for install the update for the windows app launcher.