What about this: Do you use any third-party AV software?
If so, uninstall it for the duration of the upgrade. I'm on a Hero Z690 and I was getting stuck at a later stage than you (always 86%) until I uninstalled Norton 360 using their "Norton 360 Rem...
@Fringe09 - Corsair has just released ICUE v5.2.128 which is using an updated CPUID SDK. Finally, ICUE can display the NVIDIA 40-series Hotspot temperature.
None of the 40-series GPU's will show the hot-spot temperature under ICUE at this time. I've been pushing (and querying why the 30-series can) on the forums for this since the release of the 4090 (I have a TUF 4090 OC).
EK blocked 4090 TUF OC /12900k - my score for Speedway is a bit north of 10k at stock.@Chunggy - check the mounting pressure of your GPU block. I know that 30-series cards were prone to run at 410MHz if the mounting pressure was too great.
