(SOLVED!) Problems installing Windows 2000 SP4 on a Thinkpad T420

[spaztron64]

EDIT: @blackwingcat's modded 2018 acpi.sys fixes everything (http://blog.livedoor.jp/blackwingcat/archives/1974336.html).

Man, where do I even begin?

The setup complains how the BIOS is not ACPI compliant. Skipping this is only possible by using the "Standard PC" HAL...which is obviously not good for a multicore laptop.
Switching to ACPI Multiprocessor HAL post-install leads to 0x7b "INACCESSIBLE BOOT DEVICE", and switching to MPS Multiprocessor leads to c000021a "The Session Manager Initialization system process terminated unexpectedly with a status of 0xc000026c".

The EHCI controller drivers refuse to work, likely because of the Standard PC HAL.

Hjalp mig.

Edited February 20, 2020 by spaztron64
SOLVED!

[win32]

I have a report from a user on an X230T, who stated that the regular ACPI HAL worked somehow. If that doesn't work, you can install BWC's Extended Core v16a which has updated HALs and try changing them then.

The EHCI driver issue should not be related to HALs (since they do apparently work with the MPS HAL), though here are the instructions to get them working:

 

[spaztron64]

Unfortunately, even after updating to Extended Core, switching to ACPI Multiprocessor PC results in INACCESSIBLE_BOOT_DEVICE.
I have also just read this topic (https://www.experts-exchange.com/questions/20820090/inaccessible-boot-device-after-Multiprocessor-Upgrade.html) that says that switching from non-ACPI to ACPI is very problematic.

EDIT: Switching to MPS Multiprocessor after installing ExCore v16a results in a hang at Mup.sys

Edited February 19, 2020 by spaztron64
Update on the situation

[spaztron64]

Good news, @blackwingcat's modded acpi.sys (http://blog.livedoor.jp/blackwingcat/archives/1974336.html) fixes everything!

[almawardi]

Can someone upload this acpi.cab patch here or somewhere else, i can not download from blackwingcat server (server error forbidden)

[Ximonite]

I don't have the CAB file, but I have an nLite addon that contains the patched acpi.sys

http://ximonite.com/ExtendedCore16a.zip