First of all I have seen people ask for help on this many times but I not really seen a sure 'this fixes it' answer.
I tried to update my X-Plane 11 to the latest version. It downloaded the installer. Goes through all the steps including checking files. Then it ends with the message The technical problem was: Permission denied...
My X-Plane 11 is on my E: drive, a SSD drive. I made sure this whole folder and files within it are not Read Only. All files have permissions of Modify. Read & Execute, Read and Write. I ran it again with the same result. I then ran the X-Plane 11 Installer.exe from my E:\X-Plane 11\ folder. I right clicked on it and chose Run as administrator. I still get the same same message about Permission denied. Below is from the X-Plane Installer log file. In the log file I saw it has Permission denied. Perhaps you do not have access to a directory or file system (C:\jenkins\design-triggered\source_code\core\files\FILE_ops.cpp:1478. What is this? I have no C:\jenkins\ folder at all, never have. Or was this just an example?
I have other applications on this E:drive. One updates every 2-3 months but it never has a permissions issues.
Installer log.txt for X-Plane Installer 4.11r1 compiled on Aug 30 2018 16:07:12
Installer started on Fri Dec 28 22:06:31 2018
This log file is generated automatically by Laminar Research applications and contains diagnostics about your graphics hardware, installation, and any error conditions.
If you need to contact tech support or file a bug, please send us this file. NOTE: this file is rewritten every time you start ANY of your X-System applications.
Windows 10.0 (build 17134/2)
This is a 64-bit version of Windows.
CPU type: 8664
Physical Memory (total for computer): 34289852416
( graphics card info and updater selected message snipped )
0:00:09.586 D/WIZ: Advancing from wizard step "Welcome" to "Pick Destination"
0:00:13.696 D/WIZ: Advancing from wizard step "Pick Destination" to "Check Servers"
0:00:15.697 D/WIZ: Advancing from wizard step "Check Servers" to "Scan Existing Files"
0:00:35.034 E/DVD: -------------------------------------------------------------
0:00:35.034 E/DVD: Error checking files (4 - 13): Permission denied. Perhaps you do not have access to a directory or file system
0:00:35.034 E/DVD: Reading file: E:\X-Plane 11/Resources/map data/water/+60-100/+63-099.shp
0:00:35.034 E/DVD: At: C:\jenkins\design-triggered\source_code\core\files\FILE_ops.cpp:1478
0:00:35.034 E/DVD: -------------------------------------------------------------
0:00:35.059 E/INS: Error processing E:\X-Plane 11/Resources/map data/water/+60-100/+63-099.shp: Permission denied. Perhaps you do not have access to a directory or file system (C:\jenkins\design-triggered\source_code\core\files\FILE_ops.cpp:1478)
0:00:35.059 D/WIZ: Advancing from wizard step "Scan Existing Files" to "Finish"
Clean exit from threads.