On a Windows Vista-based computer or on a Windows Server based computer, the Microsoft Inter Site Automatic Tunneling Address Protocol (ISATAP ). Microsoft ISATAP Adapter #3 not working. Windows cannot load the drivers required for this device. I'm guessing I would need to update the. Download the latest drivers for your Microsoft ISATAP Adapter to keep your Computer up-to-date. Hi @SANDAN03 Welcome to the HP Support Forums! It is a great place to find the help you need, from other users, HP experts, and other. I installed upgrades (microsoft) and when I go to Network Adapters under Device Manger i Can see little yellow sign under When I go to. Norton tells me Microsoft ISATAP Adapter #3 device is not working properly Windows cannot load the required device drivers(code 31) I tried to update this but it said it was updated and working, Norton device manager says it isn't. Have Network Adapter issues with DELL Inspiron. So what exactly do you see listed under the Network Adapters now just those 3 and thats it? If yes, then that is correct. Not sure why those Microsoft ISATAP. I went to "Device Manager" and It pointed a big Triangular! mark over "Microsoft ISATAP Adapter #3". Along with this message when I clicked. You dont need those,go to device manager and Just uninstall them. It happened for me, when I uninstalled vista sp1. Reinstalling sp1 fixed the problem.