The virtual disk service should be set to manual by default. In case system restore does not fix things:
The virtual disk service depends on Plug and Play, Remote Procedure Call (RPC), DCOM Server Process Launcher, and RPC Endpoint Matcher services directly. There are no indirect dependencies.
Make sure Plug and Play, Remote Procedure Call (RPC), DCOM Server Process Launcher, and RPC Endpoint Matcher services are all set to start with Automatic enabled, and make sure those services have started.
As to the tablet no longer working, if system restore does not fix the problem, uninstall all devices related to it through device manager and go through the USB troubleshooting steps.
