I understand that you do not know how to clean the form with the mstsc cache, how? The program is such a ccleaner - you clean it and nothing will happen. Advice - do all the actions on the VM then you simply delete the OS along with the traces, which are left with a lot of Windows. On the very dedik, of course, also needs to be cleaned. It is also desirable to still ccleaner, plus to clean the security logs.