F5F Stay Refreshed Software Operating Systems MBR2GPT caused the system to become unbootable, possibly due to an issue.

MBR2GPT caused the system to become unbootable, possibly due to an issue.

MBR2GPT caused the system to become unbootable, possibly due to an issue.

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EpicMike115
Member
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175
11-12-2021, 11:20 PM
#1
Hey, looks like you're stuck with a tricky setup. I see you've got the new SSD installed but still have legacy mode active. You were trying to switch to Windows 11 which needs secure boot, so you explored GPT and UEFI settings. After running MBR2GPT, you got the "disk 3 couldn't be validated" message and couldn't boot. You checked TPM and secure boot, but nothing worked. Eventually, turning on TPM and secure boot helped, and the MSI B350 Tomahawk booted straight into UEFI. You tried disabling TPM and adjusting BIOS settings, but nothing changed. You're spending a lot of time trying to fix this without a Windows installation media. Someone might have a better idea.
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EpicMike115
11-12-2021, 11:20 PM #1

Hey, looks like you're stuck with a tricky setup. I see you've got the new SSD installed but still have legacy mode active. You were trying to switch to Windows 11 which needs secure boot, so you explored GPT and UEFI settings. After running MBR2GPT, you got the "disk 3 couldn't be validated" message and couldn't boot. You checked TPM and secure boot, but nothing worked. Eventually, turning on TPM and secure boot helped, and the MSI B350 Tomahawk booted straight into UEFI. You tried disabling TPM and adjusting BIOS settings, but nothing changed. You're spending a lot of time trying to fix this without a Windows installation media. Someone might have a better idea.

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lowjgk
Junior Member
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19
11-14-2021, 08:52 AM
#2
Activate secure boot, insert a USB with Windows installer and perform a repair to likely resolve the issue.
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lowjgk
11-14-2021, 08:52 AM #2

Activate secure boot, insert a USB with Windows installer and perform a repair to likely resolve the issue.

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EnkyTerror
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64
12-05-2021, 10:10 AM
#3
Yeah, I figured that out... Sadly, I don’t have any Windows media files. I’m limited to my smartphone. A lot of testing with Windows finally led me to an error—no winstart.exe found, which isn’t unexpected. If anyone has suggestions, I’m all ears. But I doubt there are solutions.
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EnkyTerror
12-05-2021, 10:10 AM #3

Yeah, I figured that out... Sadly, I don’t have any Windows media files. I’m limited to my smartphone. A lot of testing with Windows finally led me to an error—no winstart.exe found, which isn’t unexpected. If anyone has suggestions, I’m all ears. But I doubt there are solutions.

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alejandrobo1
Posting Freak
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877
12-19-2021, 03:46 PM
#4
the windows 10 21h1 x64-bit installer seems to have major problems with the UEFI setup... i was advised to run it in MBR mode instead. both windows 10 21h1 and windows 11 x64-bit are failing the repair option "safemode with network connection," which returns the error "network connection not available in safemode." after multiple reinstalls, it keeps freezing and rebooting at "restart PC" or "troubleshoot," with the hope that re-installing will help.
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alejandrobo1
12-19-2021, 03:46 PM #4

the windows 10 21h1 x64-bit installer seems to have major problems with the UEFI setup... i was advised to run it in MBR mode instead. both windows 10 21h1 and windows 11 x64-bit are failing the repair option "safemode with network connection," which returns the error "network connection not available in safemode." after multiple reinstalls, it keeps freezing and rebooting at "restart PC" or "troubleshoot," with the hope that re-installing will help.

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