Hi @mamuka,
As far as I know, the BIOS has no option to permanently turn off the Wifi. It can be set to either Off or Last state, but this only determines the state of the Wifi module on start-up, you should still be able to turn the Wifi on and off using the FN - F7 key combination (If this does not work, you might have to reinstall the Launchmanager).
Kind regards,
Paul
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