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October 23rd, 2025 19:47
XPS 9350 cannot boot Windows after latest DCU updates
We have a small fleet of XPS 9350 laptops that will not boot Windows after installing the lastest Dell Command Updates. It seems to be caused by the Killer Performance Driver Suite UWD v36.25.3250.
Booting into safe mode, enabling the msiserver service and removing the Killer Performance Driver Suite UWD installation repairs the ability to boot Windows.
Boot into Windows Safe Mode (extra fun if you have bitlocker and LAPS setup)
Open admin command prompt window from task manager
REG ADD "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\MSIServer" /VE /T REG_SZ /F /D "Service"
net start msiserver
appwiz.cpl
Remove the Killer Performance Driver Suite UWD installation
Reboot normally
You may need to connect the laptop to ethernet afterwards so it can install wifi drivers, most of ours didn't seem to need this step, a couple did for some reason.
DELL-Jesse L
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October 24th, 2025 05:43
I will send this to our engineers for review. Thanks for letting us know.
To receive assistance from Dell chat support, they need to verify the warranty status and ownership. Then you must troubleshoot with them. Click the "Get Help Now" icon on the right to start a live chat session. If already out of warranty, click here for the Dell out of warranty offering.
Maverick78
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October 24th, 2025 15:04
Thanks. The actual BSOD boot error the laptops receive is "pnp_detected_fatal_error" until the Killer Suite is removed.
Huniper
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October 25th, 2025 13:40
Thank you for the post! I have this exact problem and removing the Killer UWD solved it.
Maverick78
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October 28th, 2025 14:56
An additional data point on this, it seems to be Windows 11 25H2 and the Killer Suite conflicting. If the Killer Performance Driver Suite UWD v36.25.3250 is installed prior to 25H2, then 25H2 will fail and roll back itself, leaving 25H2 unable to install. If 25H2 is already installed, and then DCU installs the latest Killer Suite, then the laptop will be in the unbootable state requiring manual intervention.
012410
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October 29th, 2025 06:35
The same issue occurred, it seems to have been resolved for me after the following update.
are there any other cases?
- Dell SupportAssist OS Recovery Plugin for Dell Update. 5.5.15.0, A00
DELL-Jesse L
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October 30th, 2025 11:13
@Maverick78 The engineering team reported back that they could not replicate the issue. They request you contact the support team for assistance. You can do this by clicking the Get Help Now icon to the right of this thread to be connected to a support agent.
(edited)