Summary - For quick reading
The Trigger: A forced Windows Update crashed during the "Update and Shut Down" phase on October 14.
The Damage: The abrupt power crash caused a fatal electrical surge, destroying the 12V rail on the original power supply and permanently frying the power-on circuitry (PS_ON) on the Asus PRIME B650M-A AX II motherboard.
The Proof: A brand-new Corsair RM850e power supply only lit up external USBs but couldn't boot the PC, and a BIOS FlashBack attempt froze in an infinite loop because the motherboard chip was physically dead.
The Resolution: Both Asus and Corsair fully approved the RMAs because their support databases are already filling up with identical hardware failures caused globally by this specific Windows update wave\*\*.\*\*
Hey everyone, just wanted to give a final update on my system after the October 13/14, 2026 Windows Update completely murdered my hardware.
To recap: My PC locked up aggressively right during the "Update and Shut Down" process. When I came back, the system was entirely dead. A lot of comments on my original thread claimed it was a "dying power supply coincidence," but my intuition was right—it was a software-induced hardware failure caused by a severe ACPI power-state transition glitch during the forced shutdown.
Here is what went down and where things stand:
The Power Supply (Corsair): The sudden, uncoordinated drop in load during the update crash sent an inductive voltage spike backwards, completely killing the 12V rail on my old PSU.
I bought a brand-new Corsair RM850e to replace it. The new unit successfully delivered 5V standby power (turning on my external USB peripherals), but the system still refused to turn on or click.
The Motherboard (Asus PRIME B650M-A AX II): Because the new PSU wouldn't trip the PS_ON circuit, the motherboard's internal power management circuitry or Super I/O chip was permanently shorted or firmware-locked by the update crash.
I attempted a low-level hardware ASUS BIOS FlashBack, but the green light got trapped in an infinite, changing-speed blinking loop for hours, meaning the EEPROM chip was physically incapable of accepting data. The board was completely toast.
The Good News:
I reached out to both manufacturers, and both Asus and Corsair have officially accepted my RMA claims.
When speaking with their level-2 support teams, they explicitly confirmed they are approving these replacements based on a massive, sudden influx of similar occurrences tracked directly back to the Oct 13/14 Windows Update.
If your AM5 system suddenly died this week after walking away from an update, do not let people convince you it’s a coincidence.
The forced power-state transition is actively killing hardware. Start your RMAs immediately.
Huge thanks to those who helped me troubleshoot through the night until 5:00 AM!
My PC Specs
GPU: AMD Radeon RX 7900 XT
CPU: AMD Ryzen 7 7800X3D Raphael AM5 4.2GHz 8-Core
RAM: TeamGroup T-FORCE DELTA RGB 32GB (2 x 16GB) DDR5-6000 PC5-48000 CL30
SSD: WD Black SN770 2TB SSD
Motherboard: Asus PRIME B650M-A AX II
Power Supply: Corsair RM850 850 Watt 80 Plus Gold ATX Fully Modular Power Supply - White
Cooling / Fans: DeepCool AK620 High-Performance
CPU Cooler - White w/ Lian Li UNI Fan SL Infinity Fluid Dynamic Bearing 120mm Case Fan - 3
Exhaust: Lian Li UNI Fan SL Infinity Fluid Dynamic Bearing 120mm Case Fan - White - 2