STOP error after installing Update Rollup 1 for Windows 2000 Server

Hello, I'm having a problem with a clean install of Windows 2000 Server as a guest under Windows Server 2008 R2. I installed from the original disk and updated to SP4 via network install file. All other updates were applied via WSUS. Here's the order everything was installed with reboots between each:

Clean Install
SP4 Upgrade
Install Integration Services
Joined Domain
Install Updates

Using snapshots, I was able to narrow it down to Update Rollup 1 for Windows 2000 Service Pack 4 (KB891861). Without this pack, the server runs fine, but if I install it, I get the following STOP error on next boot.

STOP: 0x000000CE (0xEB040000,0x00000000,0x80458399,0x00000000)
DRIVER_UNLOADED_WITHOUT_CANCELLING_PENDING_OPERATIONS
This driver may be at fault :vmstorfl.sys

Address EB040000 base at EB040000, DateStamp 00000000 - vmstorfl.sys
Address 80458399 base at 80400000, DateStamp 384d9b17 - ntoskrnl.exe


I noticed this update pack has some SCSI related known issues, but the KB article notes a different stop error. Is this a Hyper-V specific problem?