Hello James, > On Vista x64, my understanding is that the TAP driver > would need to be signed by Microsoft themselves.
wrong Digital Signatures for Kernel Modules on x64-based Systems Running Windows Vista http://www.microsoft.com/whdc/system/platform/64bit/kmsigning.mspx How to Obtain a Software Publishing Certificate (64bitDriverSigning.doc) Use the following steps to obtain an SPC for signing your kernel-mode software that meets the mandatory kernel-mode code-signing policy: 1. Obtain an SPC from a commercial CA that issues digital certificates for signing kernel-mode code. The list of CAs who provide SPCs (or code-signing certificates) that can be used for kernel-mode code signing is available at the Microsoft Cross-certificates for Windows Vista Kernel Mode Code Signing Web page listed in Resource at the end of this paper. greetings Carsten
