Windows Kernel and Usermode Antiroot kit

The goal for this project is to develop a driver (or system service) that will be able to call few Nt and Zw functions that were hooked and intercepted by a rootkit. Service will be used as a small anti rootkit. Service should be able to accept data from external usermode application and execute desired functions. Service should be useable on Windows 7 x32 and x64 (7601 build). For x64 no code signing is required. If driver will be useable in test mode that is enough.