Windows 10 Enterprise LTSC 2019 x64 - File system error (-1073741515).

PsychedelicShaman

New Member
Hello, i am trying to make my own perfect custom .iso of LTSC 2019 since long time already, however recently i am getting this problem all the time when trying to execute anything as Administrator and im not really sure what causes this mess, but i suspect it's caused by removal of some component.
Im using NTLite 1.8.0.6650 x64 Home (paid version), the base .iso is SW_DVD5_WIN_ENT_LTSC_2019_64-bit_Polish_MLF_X21-96457.iso, which is LTSC 2019 refresh .iso, 100% original from VLSC, hashes match.
I integrate newest updates + .NET Framework 3.5 from the extracted .iso directory, i enable "DirectPlay" and "Legacy Components" in Features & remove those components:

-Windows Biometric Service
-BioEnrollment
-ParentalControls
-PeopleExperienceHost
-SmartScreen
-Anti-Malware Scan Interface
-System Guard
-SecHealthUI (Windows Defender)

Im attaching my auto-saved preset, maybe you guys can help me to debug what is wrong? :)
 

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Clanger

Well-Known Member
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nuhi

NTLite developer
Staff member
Hello, i am trying to make my own perfect custom .iso of LTSC 2019 since long time already, however recently i am getting this problem all the time when trying to execute anything as Administrator and im not really sure what causes this mess, but i suspect it's caused by removal of some component.
Im using NTLite 1.8.0.6650 x64 Home (paid version), the base .iso is SW_DVD5_WIN_ENT_LTSC_2019_64-bit_Polish_MLF_X21-96457.iso, which is LTSC 2019 refresh .iso, 100% original from VLSC, hashes match.
I integrate newest updates + .NET Framework 3.5 from the extracted .iso directory, i enable "DirectPlay" and "Legacy Components" in Features & remove those components:

-Windows Biometric Service
-BioEnrollment
-ParentalControls
-PeopleExperienceHost
-SmartScreen
-Anti-Malware Scan Interface
-System Guard
-SecHealthUI (Windows Defender)

Im attaching my auto-saved preset, maybe you guys can help me to debug what is wrong? :)
The cause of it is:
<c>amsi 'Anti-Malware Scan Interface'</c>

Description of it also states the possibility of it. Some people report they can remove it, some only in real machine, really weird component, thinking of locking it some more.

Thanks.
 

PsychedelicShaman

New Member
The cause of it is:
<c>amsi 'Anti-Malware Scan Interface'</c>

Description of it also states the possibility of it. Some people report they can remove it, some only in real machine, really weird component, thinking of locking it some more.

Thanks.
Thanks, i confirm AMSI was the cause of this problem, just tried without removing it and everything's perfect now. :)
 

nuhi

NTLite developer
Staff member
An update regarding this.
Finally found out, UAC depends on AMSI, meaning it's not AMSI's fault, it's just that us who keep UAC, must not remove it.
Will shift components in next, so it's obvious, thanks.
 

Saaglem

Active Member
So....bottom line.....I can remove AMSI as long as I remove UAC as well. Good to know. Now I can remove that along the rest.
 

PsychedelicShaman

New Member
An update regarding this.
Finally found out, UAC depends on AMSI, meaning it's not AMSI's fault, it's just that us who keep UAC, must not remove it.
Will shift components in next, so it's obvious, thanks.
That's quite weird, i always fully disable UAC in the registry (setting EnableLUA to 0), but still had the File System Error with removed AMSI and UAC fully disabled, maybe UAC has to be fully removed (not just disabled), so i might as well remove UAC as a component from the offline install.wim, but the question is: will Cumulative Updates fail to install or bring back such components as UAC or AMSI?
I think that SecHealthUI, PeopleExperienceHost and other system "apps" are safe to remove as long as it's done via provisioned registry key in the offline install.wim and the Cumulative Updates will install without any problems in the future, but im not sure about removal of deeper components such as UAC and AMSI.
 

nuhi

NTLite developer
Staff member
It should not return, all files are the same in the eyes of G..., err cumulative update.
That said, if such a thing happens, do let me know which CU to begin with, which preset, and then to which CU to upgrade to see the issue.

Btw you must use the latest version of the tool for removals in order for CU compatibility to be the best so far.
If the removals were done with an older version, returning of files might happen. It's not the end of the world, you can always Host Refresh using the newer version without reinstalling all your apps.
 
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