The best way around this is to edit the registry to unblock access.

Firstly you’ll need to edit the registry, so if you haven’t a registry editor then now is a good time to get one. One of my favourites is  here (http://www.phm.lu/Products/PocketPC/RegEdit/)

Once installed, start up RegEdit and navigate to

\HKEY_LOCAL_MACHINE\Security\SoftwareDisable\DisabledSystemFiles\parms\0

and delete the keys ‘name’ and ‘value’. Then restart your device and then you should be able to start Internet Sharing successfully.

Also once you have done this – consider looking at WMWifiRouter (http://freewareppc.com/communication/wmwifirouter.shtml) which is a fantastic tool for turning for HTC into a Wifi Router – sharing your HTC’s 3G or data connection across it’s WIFI ability. Cool.