In essence, the RFBUS driver enables low-level communication over an internal "virtual bus" that Toshiba used extensively in laptops manufactured between 2008 and 2015. Without it, Windows 11 cannot talk to the embedded controller (EC) properly.
The primary culprit behind the "Toshiba RfBus" error is usually a brand transition. Older Toshiba laptops utilized drivers. Over time, Toshiba transitioned this technology to Dynabook . toshiba rfbus driver windows 11
Click > Browse and navigate to the extracted folder. Look for an .inf file named rfbus.inf or tosrfec.inf . In essence, the RFBUS driver enables low-level communication