(HELP) Bios update InsydeFlash freeze at initialization

[sempak]

Hi. My laptop Lenovo G460 factory bios version 29CN27WW (V2.04) prevent me from using 7260HMW wifi card. I searched this forum and found 29CN38WW (V2.15) and tried to flash it but immediately freezing after Insyde program start. I waited one hour, it still freezing. I braced myself for possibly effectively bricking my only laptop by forcing it shutdown, fortunately the laptop can still boot. I tried again for a second time still the same. I need the wifi card to work.

[Maxinator500]

Disconnect the battery when freezed, or use Win7.

[sempak]

I forgot to mention that the batteries are all dead, regular battery and CMOS. And I use Windows 10 Pro. I plugged it in just to avoid the Insyde warning.