MSI Statement on "Unsupported Processor" Error Message of Windows 11 Update KB5029351 Preview

btarunr · Aug 25, 2023

MSI has received several reports of users encountering a Blue Screen of Death that has an error message that reads "UNSUPPORTED_PROCESSOR" with MSI's 600/700 series motherboards after installing the Windows 11 update, KB5029351 Preview. Both MSI and Microsoft are aware of the "UNSUPPORTED_PROCESSOR" error and have begun investigating the root cause. While the investigation is underway, we recommend that all users temporarily refrain from installing the KB5029351 Preview update in Windows. We will keep you updated on the progress of our investigation.

Temporary Workaround
If you have already encountered this issue, KB5029351 might automatically be uninstalled to allow Windows to restore to normal. However, if KB5029351 is not automatically uninstalled, we recommend reverting your BIOS to the previous version and uninstalling KB5029351 from Windows.

If you are unsure of how to restore to older BIOS, this video link will help you on how to flash BIOS on MSI motherboards. More information on KB5029351 can be found here.

View at TechPowerUp Main Site

SimpleTECH · Aug 25, 2023

Interesting I had this problem with an ASUS motherboard (ProArt Z690-CREATOR WIFI) and an Intel i7-13700K. But after restarting a few times, having Windows uninstall/revert the update, I redownloaded it again and after restarting it was fine. In fact, the latest 22631.2262 that came out yesterday has been okay.

LabRat 891 · Aug 25, 2023

Peculiar. This is the same kinda error you get trying to install 64-bit Windows 8.1 or newer on a DDR1 K8.

I find it funny that modern PC owners are getting the same error the Retro community just has to 'deal with'.

RJARRRPCGP · Aug 26, 2023

At this rate, people are likely surprised that they still have yet to be aware of Microsoft enforcing the pre-Coffee Lake and pre-Pinnacle Ridge processor ban with that stop code.

If Microsoft bans those processors at the kernel level, then it's game over for the Rufus workarounds! Then it means no more 11 for Haswell.

LabRat 891 said:
Peculiar. This is the same kinda error you get trying to install 64-bit Windows 8.1 or newer on a DDR1 K8.

I find it funny that modern PC owners are getting the same error the Retro community just has to 'deal with'.

More like what I would expect, if I try to use Windows 11 on a 65nm Core 2, LOL.

Now about the Windows version of a kernel panic=Was there a whoops made by MSI, where the processor information was missing, or did the new BIOS make the CPU unstable, even when I never got that stop code for even an insanely unstable CPU core OC.

Dr. Dro · Aug 27, 2023

RJARRRPCGP said:
At this rate, people are likely surprised that they still have yet to be aware of Microsoft enforcing the pre-Coffee lake and pre-Pinnacle Ridge processor ban with that stop code.

If Microsoft bans those processors at the kernel level, then it's game over for the Rufus workarounds! Then it means no more 11 for Haswell.

More like what I would expect, if I try to use Windows 11 on a 65nm Core 2, LOL.

Now about the Windows version of a kernel panic=Was there a whoops made by MSI, where the processor information was missing, or did the new BIOS make the CPU unstable, even when I never got that stop code for even an insanely unstable CPU core OC.

65 nm Core 2 (Conroe) has a more advanced instruction set than the Phenom II. It's not really important, both should run Windows 11 as it stands today.

This just seems like a weird bug. I wasn't affected, even on a system where it could happen (latest 14th-gen compatible BIOS, 13th gen i9 CPU + Z690 motherboard)

Mussels · Aug 27, 2023

So their solution is to do nothing?
What's going to happen if someone has those new CPU's and wants to use them with that BIOS?

Dr. Dro · Aug 27, 2023

Mussels said:
So their solution is to do nothing?
What's going to happen if someone has those new CPU's and wants to use them with that BIOS?

I think MS has already fixed or pulled the update :confused:

Mussels · Aug 30, 2023

Dr. Dro said:
I think MS has already fixed or pulled the update

It's a weird combination.
It only affected MSI boards with a BIOS for upcoming CPUs (why was it public in the first place?) using windows 11 that received that update.

It automatically uninstalled after a few reboots of the error, so no one was ever stuck with a dead PC because of this.

Dr. Dro · Aug 30, 2023

Mussels said:
It's a weird combination.
It only affected MSI boards with a BIOS for upcoming CPUs (why was it public in the first place?) using windows 11 that received that update.

It automatically uninstalled after a few reboots of the error, so no one was ever stuck with a dead PC because of this.

I wonder if it's only for the Z790s, BIOS 1.C0 (released July 21) on the Z690 Ace here seemed ok

Mussels · Aug 30, 2023

Dr. Dro said:
I wonder if it's only for the Z790s, BIOS 1.C0 (released July 21) on the Z690 Ace here seemed ok

Whatever BIOS it was, added support for 14th gen but also somehow renamed the 13th gen CPUs - it's entirely likely it was just a typo from MSI and everyones blown it into a massive issue for windows.

Dr. Dro · Sep 27, 2023

The Z690 Ace just received a 1.D0 BIOS update that aims to fix this specific issue, 1.C0 was pulled from the MSI website.

System Name	RBMK-1000
Processor	AMD Ryzen 7 5700G
Motherboard	ASUS ROG Strix B450-E Gaming
Cooling	DeepCool Gammax L240 V2
Memory	2x 8GB G.Skill Sniper X
Video Card(s)	Palit GeForce RTX 2080 SUPER GameRock
Storage	Western Digital Black NVMe 512GB
Display(s)	BenQ 1440p 60 Hz 27-inch
Case	Corsair Carbide 100R
Audio Device(s)	ASUS SupremeFX S1220A
Power Supply	Cooler Master MWE Gold 650W
Mouse	ASUS ROG Strix Impact
Keyboard	Gamdias Hermes E2
Software	Windows 11 Pro

Processor	Intel Core i9-13900K
Motherboard	ASUS ProArt Z690-CREATOR WIFI
Cooling	Custom water
Memory	G.Skill Trident Z5 RGB 32GB DDR5-6400 CL32
Video Card(s)	Dell RTX 4090
Storage	Sabrent 1TB Rocket 4 Plus
Display(s)	LG 27GN950-B
Case	Fractal Design Meshify 2 XL (Dark Tint)
Power Supply	SAMA XP1000W
Mouse	DAREU EM901
Keyboard	RK ROYAL KLUDGE RK100 (white with blue switches)

System Name	Sleepy Painter
Processor	AMD Ryzen 5 3600
Motherboard	Asus TuF Gaming X570-PLUS/WIFI
Cooling	FSP Windale 6 - Passive
Memory	2x16GB F4-3600C16-16GVKC @ 16-19-21-36-58-1T
Video Card(s)	MSI RX580 8GB
Storage	2x Samsung PM963 960GB nVME RAID0, Crucial BX500 1TB SATA, WD Blue 3D 2TB SATA
Display(s)	Microboard 32" Curved 1080P 144hz VA w/ Freesync
Case	NZXT Gamma Classic Black
Audio Device(s)	Asus Xonar D1
Power Supply	Rosewill 1KW on 240V@60hz
Mouse	Logitech MX518 Legend
Keyboard	Red Dragon K552
Software	Windows 10 Enterprise 2019 LTSC 1809 17763.1757

System Name	KHR-1
Processor	Ryzen 9 5900X
Motherboard	ASRock B550 PG Velocita (UEFI-BIOS P3.40)
Memory	32 GB G.Skill RipJawsV F4-3200C16D-32GVR
Video Card(s)	Sapphire Nitro+ Radeon RX 6750 XT
Storage	Western Digital Black SN850 1 TB NVMe SSD
Display(s)	Alienware AW3423DWF OLED-ASRock PG27Q15R2A (backup)
Case	Corsair 275R
Audio Device(s)	Technics SA-EX140 receiver with Polk VT60 speakers
Power Supply	eVGA Supernova G3 750W
Mouse	Logitech G Pro (Hero)
Software	Windows 11 Pro x64 23H2

System Name	"Icy Resurrection"
Processor	13th Gen Intel Core i9-13900KS Special Edition
Motherboard	ASUS ROG MAXIMUS Z790 APEX ENCORE
Cooling	Noctua NH-D15S upgraded with 2x NF-F12 iPPC-3000 fans and Honeywell PTM7950 TIM
Memory	32 GB G.SKILL Trident Z5 RGB F5-6800J3445G16GX2-TZ5RK @ 7600 MT/s 36-44-44-52-96 1.4V
Video Card(s)	ASUS ROG Strix GeForce RTX™ 4080 16GB GDDR6X White OC Edition
Storage	500 GB WD Black SN750 SE NVMe SSD + 4 TB WD Red Plus WD40EFPX HDD
Display(s)	55-inch LG G3 OLED
Case	Pichau Mancer CV500 White Edition
Power Supply	EVGA 1300 G2 1.3kW 80+ Gold
Mouse	Microsoft Classic Intellimouse
Keyboard	Generic PS/2
Software	Windows 11 IoT Enterprise LTSC 24H2
Benchmark Scores	I pulled a Qiqi~

MSI Statement on "Unsupported Processor" Error Message of Windows 11 Update KB5029351 Preview

btarunr

Editor & Senior Moderator

SimpleTECH

LabRat 891

RJARRRPCGP

Dr. Dro

Mussels

Freshwater Moderator

Dr. Dro

Mussels

Freshwater Moderator

Dr. Dro

Mussels

Freshwater Moderator

Dr. Dro

System Name	Rainbow Sparkles (Power efficient, <350W gaming load)
Processor	Ryzen R7 5800x3D (Undervolted, 4.45GHz all core)
Motherboard	Asus x570-F (BIOS Modded)
Cooling	Alphacool Apex UV - Alphacool Eisblock XPX Aurora + EK Quantum ARGB 3090 w/ active backplate
Memory	2x32GB DDR4 3600 Corsair Vengeance RGB @3866 C18-22-22-22-42 TRFC704 (1.4V Hynix MJR - SoC 1.15V)
Video Card(s)	Galax RTX 3090 SG 24GB: Underclocked to 1700Mhz 0.750v (375W down to 250W))
Storage	2TB WD SN850 NVME + 1TB Sasmsung 970 Pro NVME + 1TB Intel 6000P NVME USB 3.2
Display(s)	Phillips 32 32M1N5800A (4k144), LG 32" (4K60) \| Gigabyte G32QC (2k165) \| Phillips 328m6fjrmb (2K144)
Case	Fractal Design R6
Audio Device(s)	Logitech G560 \| Corsair Void pro RGB \|Blue Yeti mic
Power Supply	Fractal Ion+ 2 860W (Platinum) (This thing is God-tier. Silent and TINY)
Mouse	Logitech G Pro wireless + Steelseries Prisma XL
Keyboard	Razer Huntsman TE ( Sexy white keycaps)
VR HMD	Oculus Rift S + Quest 2
Software	Windows 11 pro x64 (Yes, it's genuinely a good OS) OpenRGB - ditch the branded bloatware!
Benchmark Scores	Nyooom.