RE: Dell XPS 8500 Windows 8 UEFI Installation Boot Loop "The computer restarted unexpectedly or encountered an unexpected error."

Hi funkmasterta,

I will suggest you to check the BIOS settings provided below to see if you have similar settings. If not you may try these settings and then install the operating system.

  • Go to the BIOS screen by pressing F2 at the Dell logo 4-5 times.
  • Navigate to ‘Advanced Tab’ and select ‘Onboard Device Configuration’.
  • Set ‘SATA Mode’ to ‘AHCI’.
  • Navigate to ‘Boot’ tab and set ‘Secure Boot’ to ‘Enable’ and ‘Load Legacy OPROM’ to ‘Disable’.
  • Boot Mode should be set to ‘UEFI’.
  • Save the settings and Exit from the BIOS.

Once the system restarts, Go to the ‘One Time Boot Menu’ by pressing F12 at the Dell logo 6-7 times.

Select the boot device under UEFI to boot.

Keep me posted with the results. I will be glad to assist you further.

Thanks & Regards
Kuldeep M
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