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Reboot and Select Proper Boot Device - but temperamental

424 Views 1 Reply 2 Participants Last post by Macboatmaster, Feb 3, 2022

annatingey

Discussion Starter · Feb 3, 2022

When I boot my PC, it comes up with a screen saying Reboot and Select Proper Boot Device, or Insert Boot Media in Selected Boot device.

However, after turning it off and on again a few times, it suddenly boots up windows, but not before showing two blinking underlines between my Asus screen and the windows logo.

This problem started when I turned on fTPM for Windows 11 - but I have since been back into Bios and turned it off.

I'm very unfamiliar with BIOS - and I'm not sure if my PC is meant to be booting in Legacy or UEFI and I honestly am not sure how to check, or if that is anything to do with my problem.

I tried going into Bios and choosing the boot with optimal settings and that seemed to work for about a day, but this morning it happened again..

Any help would be great - I have everything important backed up, but I just want to understand what is happening to my computer and possibly fix it

My Specs:

OS Name: Windows 10 Pro

Processor: AMD Ryzen 9 3900X

Motherboard: ROG STRIX B450-F Gaming

BIOS Version/Date: American Megatrends Inc. 3003, 09/12/2019

SMBIOS Version: 3.2

BIOS Mode: Legacy

Tech Support Guy System Info Utility version 1.0.0.9
OS Version: Microsoft Windows 10 Pro, 64 bit, Build 19042, Installed 20201024222859.000000+000
Processor: AMD Ryzen 9 3900X 12-Core Processor, AMD64 Family 23 Model 113 Stepping 0, CPU Count: 24
Total Physical RAM: 32 GB
Graphics Card: NVIDIA GeForce RTX 2070 SUPER
Hard Drives: A: 1862 GB (610 GB Free); C: 931 GB (570 GB Free);
Motherboard: ASUSTeK COMPUTER INC. ROG STRIX B450-F GAMING, ver Rev 1.xx, s/n 200771430306886
System: American Megatrends Inc., ver ALASKA - 1072009, s/n System Serial Number
Antivirus: Windows Defender, Disabled

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Macboatmaster

· #2 · Feb 3, 2022 (Edited)

Your BIOS mode is legacy as per your post
fTPM is not properly supported in legacy BIOS, so if you did turn it on YOU must have changed the BIOS to UEFI mode or you would see that some settings for TPM were not available - even if it did allow you to turn it on
Re this

annatingey said:
his problem started when I turned on fTPM for Windows 11

So did it have 11, has it got 11 now OR was it indeed reverted back to 10as the utility information suggests

Do you know the Windows 10 is installed on an MBR drive and not on a GPT partitioned drive

Re the - suddenly boots up windows after turning off and on again a few times
It MAY suggest it is not finding the correct boot device

On the one time boot key - F8 when Asus log appears
check what options you have and report back please

You may find that disabling fast boot in the BIOS setup will solve the problem
E14401_ROG_STRIX_B450-F_GAMING_UM_WEB.pdf (asus.com)
page 69 refers

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