Windows RT 8.1 lacks the necessary driver for RNDIS.
Windows RT 8.1 lacks the necessary driver for RNDIS.
You're exploring a workaround for connecting your phone to the Windows RT 8.1 Surface using USB tethering. The issue is the Surface doesn't support the RNDIS driver needed for that connection, making it unable to locate the driver automatically. You're considering alternatives since Bluetooth setup might be cumbersome when you're away from the device. Others may have faced similar challenges, so checking community forums could help.
If there's a missing driver for Windows RT, you're out of luck. It's locked down to prevent installation of 3rd party programs. Even if you could, you couldn't run it because it's probably compiled for x86 and won't run on ARM.