Acer Aspire 5830T - Advanced settings in BIOS enabled for UEFI priority, only reloads W10 Legacy
I recently revived my old Aspire 5830T laptop to update it to W10 as a backup machine as it was gathering dust.
I planned to migrate it to GPT disk layout and enable UEFI. My BIOS didn't have these options but found a thread on 3830T and 4830T laptops that use the same Insyde 3.5 and V1.12 BIOS but with advanced options available and got the advanced menu working.
No matter what UEFI options are selected (UEFI enabled and EFI priority over legacy), no matter what media (W10 media creator, Rufus with UEFI only, DVD-ROM) it will only load Windows in legacy mode (MBR, no UEFI).
I've tried converting the unallocated disk to GPT with a partition manager and W10 installer writes over it with MBR.
I've tried creating partitions on the GPT disk with the partition manager and W10 installer errors out because "disk partition style is GPT"
Rufus with the UEFI only option on it refuses to boot and comes up with a common error screen
Trying to convert the MBR Windows to GPT/UEFI just makes it unbootable. Tried that with a couple of partition managers and the Windows MBR2GPT tool. Even MBR2GPT, which lists its errors, was not able to do it - basically it is unable to recreate the Recovery Environment e.g. REAgent .XML and any rabbit hole I went down, even formatting the EFI partition and re-adding the BCD manually wouldn't solve the problem.
I've put my Vortexbox (Linux Fedora OS) on it which brute force cleans the disk to GPT and that works fine in UEFI mode. I've also tried loading Windows after Vortexbox (seeing as a UEFI boot OS was already working - easily!!) and that throws up the GPT error again...
There is a thread on Tomshardware where the guy was having similar problems with an HP laptop and after re-flashing the firmware (same version just second go around) the UEFI install worked
TIA