[Acer V3-571G] How to unlock this BIOS (Advanced settings menu)? version 2.21

@DvL - 1.5v voltage applied to 1.35V memory wouldn’t stop it from booting, it would just apply 1.5V to the memory and carry on. Either that memory is damaged, or is not compatible for some reason such as density or other random incompatibility problem

The main issue here may be flashing a mod BIOS, not unlocking it.
While yes the unlock is not easy for a novice to do, requires assembly edits at first to figure it out, and yes you have the correct module selected in above image, it’s the flashing part that may not be easily possible (Never mind, I see recovery method works for this model).
Do you have a flash programmer, such as CH341A and a SOIC8 test clip cable? If not, order those now, it’s too cheap not to own in case you need later ($2.50 + $3.50 on ebay)

Here is the unlock edits to make, extract that "DriverSampleDXE-SetupUtility PE32 “BODY” Edit body at two bytes as follows
8DE: 59 >> Change to >> 00
8E8: 4F >> Change to >> 00

In case you can’t get it, here is unlocked general 5MB stock BIOS, cut from 6.64MB Q5WV1X64.fd (The one extracted from the EXE as you mentioned), this way it’s not specific to your laptop it will work for all users later that find this thread
To cut 5MB BIOS from 6.44MB stock FD, go to 0x10C80 and select 500000 byte block (Or select 0x10C80 to 0x510C7F), cut and paste as new, save as BIOS file name. This is the actual stock BIOS file.
Don’t program this in with programmer, it’s only meant to be used by flasher or recover method, if you want to use programmer or FPT, modify your dumped backup instead and then use that as source instead of this stock edit
http://s000.tinyupload.com/index.php?fil…228902921394628

Recovery method has been tested and proven to work on this model, here is flash recovery/flash mod BIOS instruction for this model I found at BIOS-mods forum -

Prepare USB
1. Format a USB flash drive to use the FAT32
2. Copy modified Q5WV1X64.fd to root of the newly formatted USB drive

Performing the flash
1. Shutdown the netbook
2. Remove all peripheral devices
3. Remove AC power cord
4. Put the USB stick in the USB port
5. Hold FN + ESC
6. Now press the power button (whilst still holding FN + ESC), then release all keys
7. Wait until the fan will run, then release “Fn” + “Esc” keys - The fan will run for about 2-4 minutes and the USB drive activity LED will blink
8. I think the netbook rebooted automatically. If it doesn’t, unplug the AC power cord once the fan has turned off
9. Your netbook should be updated BIOS, and boot as per normal

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