Windows File Level Restore running from Remote Shell on Windows 10 failing unexpectedly

You are trying to start Windows File Level Restore running from Remote Shell on Windows 10 but it fails unexpectedly with a general error:



In the log files (C:\ProgramData\Veeam\Backup\FLRSessions\Windows\FLR__<vm_name>_\VeeamAgent.MountVm.Client.log) you may observe following error code:

[05.09.2016 18:30:14] <  4728> mnt| Virtual space {b7ac05db-bfce-41fb-8d5c-780993e049de} was destroyed
[05.09.2016 18:30:14] <  4728> mnt| VeeamFCT driver communication library was deinitialized
[05.09.2016 18:30:14] <  4728> drv| ERR |CVeeamFCTDriver::FileMount: Failed to mount file 'C:\WINDOWS\system32\config\systemprofile\aoivmtwx.mot\veeamflr-0000417000007499-0000.flat'.
[05.09.2016 18:30:14] <  4728> drv| >>  |Details: FctVsAddFile() : HRESULT = 0x80070003
 

Windows environment variables for local system (SYSTEM) are missing or not set.

You need to recreate missing values in the following registry key on Windows with Remote Shell running: 

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment 

Name: TMP 
Type: Expandable String Value 
Value: %SystemRoot%\TEMP 

Name: TEMP 
Type: Expandable String Value 
Value: %SystemRoot%\TEMP

Afterwards please restart Windows.