INF file not registering the lower filter driver

[siho]

Hi.
This is the continuation of my previous post "Asking about filtering target LBA of an I/O request."
I'm adding my driver under disk.sys, and having some problem with registering my driver.

This is my INF file:

[Version]
Signature   = "$Windows NT$"
Class       = DiskDrive
ClassGuid   = {4D36E967-E325-11CE-BFC1-08002BE10318}
Provider    = Nascity
CatalogFile	= WinIoWatcherCore.cat
DriverVer   = 07/20/2025,1.0.0.0
PnPLockdown	= 1

[DefaultInstall.ntamd64]
CopyFiles	= @WinIoWatcherCore.sys
AddReg		= LowerFilterReg
AddService	= WinIoWatcher, 0x00000002, WinIoWatcherService

[LowerFilterReg]
HKLM,"System\CurrentControlSet\Control\Class\{4D36E967-E325-11CE-BFC1-08002BE10318}","LowerFilters",0x00010008,"WinIoWatcher"

[DestinationDirs]
DefaultDestDir = 12

[WinIoWatcherService]
DisplayName		= "WinIoWatcher"
ServiceType		= 1
StartType		= 0
ErrorControl	= 1
ServiceBinary	= %12%\WinIoWatcherCore.sys

[SourceDisksFiles]
WinIoWatcherCore.sys = 1

[SourceDisksNames]
1 = %DiskName%,,,.

[Strings]
DiskName = "WinIoWatcher Installation Media"

Apparently, the driver did not register, and the system failed with INACCESSIBLE_BOOT_DEVICE, second bugcheck parameter being C0000034 (STATUS_OBJECT_NAME_NOT_FOUND).

Is there something wrong with my INF file?
I'm kinda new to all of this, and not sure what's actually happening.

Thank you in advance.

[Tim_Roberts]

Your biggest problem is

AddService  = WinIoWatcher, 0x00000002, WinIoWatcherService

That "2" value make your driver the FUNCTION driver for the device, erasing all of the other drivers. When installing a filter using a fake INF like this, that second entry should be 0.

[siho]

Thanks for the advice. I'll change the entry and try to run the VM.