Virus removal is a large part of what IT Admins do. Combofix is hands down the best tool for this. Although VNC and many other free remote apps have no problems with Combofix, LogMeIn does. It doesn't just cancel the connection, it ruins the session when the machine is done with combofix and has restarted you have to start a new session, otherwise it wont work.
As a paying member of this service I feel this is something that should be addressed.