Windows Server 2016 IIS won't install, no errors shown

I'm trying to solve the same error that occurred three years ago and doesn't have an answer. After installing IIS via GUI or powershell Install-WindowsFeature -name Web-Server -IncludeManagementTools I get the error: (The first two lines in English say error adding or removing characteristics. The operation couldn't finish because a restart is required)

Install-WindowsFeature : Error en la solicitud para agregar o quitar características en el servidor especificado.

La operación no se puede finalizar porque es necesario reiniciar el servidor especificado.
En línea: 1 Carácter: 1
+ Install-WindowsFeature -name Web-Server -IncludeManagementTools
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : DeviceError: (@{Vhd=; Credent...Name=localhost}:PSObject) [Install-WindowsFeature], Exce
   ption
    + FullyQualifiedErrorId : DISMAPI_Error__Failed_Reboot_Required,Microsoft.Windows.ServerManager.Commands.AddWindow
   sFeatureCommand

IIS is installed until I reboot and then it rolls back and uninstalls.

Blindly trying things like DISM /Online /Cleanup-Image /RestoreHealth had no effect.

Here is c:\windows\iisx.log : Here is the relevant section in the massive c:\windows\logs\cbs

Google found lots of the same non-error but no solution worked for me.

Running the PS script(before the installation) Get-PendingReboot found here to determine if a reboot is required:

Computer           : WIN-CIE9BIN05A3
CBServicing        : False
WindowsUpdate      : False
CCMClientSDK       : 
PendComputerRename : False
PendFileRename     : False
PendFileRenVal     : 
RebootPending      : False

The relevant section of the Cbs log I think is near the end:

2018-01-05 03:22:10, Info                  CSI    00000384 Creating NT transaction (seq 8), objectname '(null)'
2018-01-05 03:22:10, Info                  CSI    00000385 Created NT transaction (seq 8) result 0x00000000, handle @0xf30
2018-01-05 03:22:10, Info                  CSI    00000386 Error STATUS_CANNOT_DELETE while executing operation DeleteFile on [l:46]'\??\C:\Windows\System32\inetsrv\apphostsvc.dll'

2018-01-05 03:22:10, Info                  CBS    Setting ExecuteState key to: ExecuteStateNone
2018-01-05 03:22:10, Info                  CBS    Setting RollbackFailed flag to 0
2018-01-05 03:22:10, Info                  CBS    Clearing HangDetect value
2018-01-05 03:22:10, Info                  CBS    Saved last global progress. Current: 0, Limit: 1, ExecuteState: ExecuteStateNone
2018-01-05 03:22:10, Info                  CBS    Exec: Scheduled TrustedInstaller for auto-start because rollback was pended. [HRESULT = 0x00000000 - S_OK]
2018-01-05 03:22:10, Info                  CBS    TI: CBS has signaled that a reboot is required.
2018-01-05 03:22:10, Error                 CBS    Exec: An error occurred while committing the transaction and the transaction rollback requires a reboot. [HRESULT = 0x80070bc9 - ERROR_FAIL_REBOOT_REQUIRED]
2018-01-05 03:22:10, Info                  CBS    Perf: InstallUninstallChain complete.
2018-01-05 03:22:10, Info                  CSI    00000387@2018/1/5:10:22:10.502 CSI Transaction @0x2003a2be850 destroyed
2018-01-05 03:22:10, Info                  CBS    Failed to execute execution chain. [HRESULT = 0x80070bc9 - ERROR_FAIL_REBOOT_REQUIRED]
2018-01-05 03:22:10, Error                 CBS    Failed to process single phase execution. [HRESULT = 0x80070bc9 - ERROR_FAIL_REBOOT_REQUIRED]
2018-01-05 03:22:10, Info                  CBS    WER: Generating failure report for package: Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~10.0.14393.0, status: 0x80070bc9, failure source: Execute, start state: Installed, target state: Installed, client id: DISM Package Manager Provider
2018-01-05 03:22:10, Info                  CBS    Not able to query DisableWerReporting flag.  Assuming not set... [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]
2018-01-05 03:22:10, Info                  CBS    Added C:\Windows\Logs\CBS\CBS.log to WER report.
2018-01-05 03:22:10, Info                  CBS    Added C:\Windows\Logs\CBS\CbsPersist_20180104154517.log to WER report.
2018-01-05 03:22:10, Info                  CBS    Added C:\Windows\Logs\CBS\CbsPersist_20180104142952.log to WER report.
2018-01-05 03:22:10, Info                  CBS    Added C:\Windows\Logs\CBS\CbsPersist_20180103145329.log to WER report.
2018-01-05 03:22:10, Info                  CBS    Added C:\Windows\Logs\CBS\CbsPersist_20171231105556.log to WER report.
2018-01-05 03:22:10, Info                  CBS    Not able to add %windir%\winsxs\pending.xml.bad to WER report. [HRESULT = 0x80070002 - ERROR_FILE_NOT_FOUND]
2018-01-05 03:22:11, Info                  CBS    FinalCommitPackagesState: Started persisting state of packages
2018-01-05 03:22:11, Info                  CBS    TI: CBS has queried the current reboot required state: 1

A few lines up in the log is another possible idea: I have IIS express installed from VS and it looks like the Express folders may be interfering with the installation.

2018-01-05 03:22:08, Info                  CBS    FLOW: Enter Installation Stage: Primitive Installer Analysis, Current Operation Stage: Installing
2018-01-05 03:22:08, Info                  CSI    00000368@2018/1/5:10:22:08.813 CSIPERF - FileMapsCreated 325ms
2018-01-05 03:22:08, Info                  CSI    00000369 Unable to delete directory [l:28 ml:29]'\??\C:\inetpub\custerr\en-US'; it is still owned by component Microsoft-Windows-IIS-HttpErrorsBinaries.Resources, version 10.0.14393.0, arch amd64, culture [l:5]'en-US', nonSxS, pkt {l:8 b:31bf3856ad364e35}

2018-01-05 03:22:08, Info                  CSI    0000036a Unable to delete directory \??\C:\inetpub\history; file CFGHISTORY_0000000001 exists

2018-01-05 03:22:08, Info                  CSI    0000036b Unable to delete directory \??\C:\inetpub\temp\appPools; file APCD57C.tmp exists

2018-01-05 03:22:08, Info                  CSI    0000036c Unable to delete directory \??\C:\inetpub; file custerr exists

2018-01-05 03:22:08, Info                  CSI    0000036d Unable to delete directory [l:29 ml:30]'\??\C:\Windows\Inf\W3SVC\0C0A'; it is still owned by component Microsoft-Windows-IIS-W3SVC.Resources, version 10.0.14393.0, arch amd64, culture [l:5]'es-ES', nonSxS, pkt {l:8 b:31bf3856ad364e35}

2018-01-05 03:22:08, Info                  CSI    0000036e Unable to delete directory \??\C:\Windows\Inf\W3SVC; file 0C0A exists

2018-01-05 03:22:08, Info                  CSI    0000036f Unable to delete directory [l:37 ml:38]'\??\C:\Windows\System32\inetsrv\en-US'; it is still owned by component Microsoft-Windows-IIS-ASPBinaries.Resources, version 10.0.14393.0, arch amd64, culture [l:5]'en-US', nonSxS, pkt {l:8 b:31bf3856ad364e35}

2018-01-05 03:22:08, Info                  CSI    00000370 Unable to delete directory [l:37 ml:38]'\??\C:\Windows\System32\inetsrv\es-ES'; it is still owned by component Microsoft-Windows-IIS-ASPBinaries.Resources, version 10.0.14393.0, arch amd64, culture [l:5]'es-ES', nonSxS, pkt {l:8 b:31bf3856ad364e35}

2018-01-05 03:22:08, Info                  CSI    00000371 Unable to delete directory [l:37 ml:38]'\??\C:\Windows\SysWOW64\inetsrv\en-US'; it is still owned by component Microsoft-Windows-IIS-ASPBinaries.Resources, version 10.0.14393.0, arch Host= amd64 Guest= x86, culture [l:5]'en-US', nonSxS, pkt {l:8 b:31bf3856ad364e35}

2018-01-05 03:22:08, Info                  CSI    00000372 Unable to delete directory [l:37 ml:38]'\??\C:\Windows\SysWOW64\inetsrv\es-ES'; it is still owned by component Microsoft-Windows-IIS-ASPBinaries.Resources, version 10.0.14393.0, arch Host= amd64 Guest= x86, culture [l:5]'es-ES', nonSxS, pkt {l:8 b:31bf3856ad364e35}

Result: nope uninstalling IIS express didn't fix the installation.