Upgrade BIOS to UEFI

[2latesmart]

I have a Gateway DX4860, Intel Quad I5, INTEL MB DH55HC w 12G RAM, Windows 7 SP1. All data backed up. I want to clean install from Windows 8.1 (Full Version). Gateway recommends BIOS update before Windows 8.1 install. (Current BIOS, P01.A2 of 04/07/2011) doesn't support UEFI). Gateway provides a BIOS upgrade flash program to P11.A3 of 9/2/2013 with optional UEFI support. The installer stops before executing with an error message that reads "ROM file size does not match existing BIOS. Gateway tech support is horrible. Help!

 

[Calvin7]

You have Gateway DX4860, that originally shipped with Windows 7 SP1.

Gateway provides a BIOS upgrade flash program to P11.A3 of 9/2/2013 that is listed as "BIOS - UEFI for Windows 8 (Not for Upgrades)".

The tag (Not for Upgrades) means that the BIOS update can be applied on computer shipped directly from factory with Windows 8 operating system.

It can not be applied on computer's upgraded from Windows 7 to Windows 8.

 

[Merllin]

I am also trying to update from P01.A1 to P12.A2 and I am experiencing the same problem.

It is a DX4380 with Windows 7.

Did you figure out how to update the BIOS?

 

[2latesmart]

I am also trying to update from P01.A1 to P12.A2 and I am experiencing the same problem.

It is a DX4380 with Windows 7.

Did you figure out how to update the BIOS?

After several failed attempts, I found that there was no path to support UEFI support. The Calvin7 response is accurate. I reverted to Windows 7 using "old" drivers from Gateway.