I hunted high and low for a Microsoft hotfix that replaced only the RNDIS drivers (and nothing else), was compatible with XP SP2, and that contained drivers which were new enough to support the device. This hotfix is intended to fix a problem that has nothing whatsoever to do with our problem other than that the RNDIS drivers are involved. I have not installed SP3 to test this so that is conjecture based upon my understanding of what's going on here and the other tests I've done. If you have already done the tetherxp.inf process (above) and it failed with 'device cannot start', you shouldn't have to do anything else after installing SP3 - it should just work. If you don't have an aversion to installing SP3 this should solve the problem and get you a bunch of other hotfixes in the process. I say 'upgrade' because if I recall correctly Microsoft made a bunch of changes between SP2 and SP3 that caused many folks problems and were generally not well received. The version number doesn't really matter - they all work - I just give you the version number so you have a way to see if your system has the expected files (if you care). Note that after each method I give you the version number of the files it will install. There are three primary ways to fix this - which you choose depends upon your particular situation. The 4 files involved are (note that the first two files start with the letter R followed by the letter N - but with some fonts it looks like a lower case M): The reason SP3 does not have this problem (unless something has overwritten the RNDIS drivers with old ones) is that the drivers that are built into SP3 are updated and support the functionality/device. It will appear to work up until the end of the driver installation whereupon the New Hardware Wizard will report 'The device cannot start. The problem is - unless you've installed a device at some point whose drivers included an updated set of Remote NDIS (RNDIS) drivers, this will fail on XP SP2 and lower. The answer to that has been documented ( PDF archive) already - use tetherxp.inf ( alternate link) to tell XP how to use the driver files (that it already has) for the tether. Initially the problem manifests itself as the XP machine asking for drivers when the Tether option is enabled on the connected phone. If you have Windows XP SP2 (or a lower service pack or no service pack) chances are good that the native USB tethering in Froyo isn't going to work for you (on that machine) without some help. This is the product of about 20 hours of accumulated testing and research but I'm going to do my best to keep it brief and leave out all the garbage you don't care about.

Rndis driver for xp