Now look next to SATA mode – if its set to AHCI mode, change it to IDE. Save and exit to reboot, and Windows should boot normally.Q: After BIOS update, my computer is trying to boot from CD or USB?To be clear, Asus is not being the least bit nefarious.Here's the deal—prior to the launch of AMD's Zen 2 processors (otherwise known as third-generation Ryzen, or Ryzen 3000), AMD's hardware partners had the green light to add PCIe 4.0 support to existing motherboard models (read: pre-X570 motherboards), at each manufacturer's discretion.However, AMD reversed course at the 11th hour, telling its hardware partners they needed to block support for PCIe 4.0 on all pre-X570 motherboards.AMD's reasoning basically boils down to wanting to eliminate confusion."This is an error we are correcting. There's no guarantee that older motherboards can reliably run the more stringent signaling requirements of Gen 4, and we simply cannot have a mix of 'yes, no, maybe' in the market for all the older motherboards.
Sometimes you may want to update your BIOS to enable new features, improve compatibility with a certain device, or fix some bugs.
This is a terrible idea and even MSI recommends against it, but sometimes we’re too lazy to go through the BIOS and this method works 98% of the time.
It’s the other 2% of the time that can cause horrible motherboard bricks, so you’ve been warned.
When the M-FLASH utility is done, it will simply display a 5 second countdown timer before rebooting your computer.
If you followed this method successfully, skip to the Troubleshooting section of this guide to address any potential errors.