Remote procedure call ( RPC ) is an Inter-process communication technology that allows a computer program to cause a subroutine or procedure to execute in another address space (commonly on another computer on a shared network) without the programmer explicitly coding the details for this remote interaction. That is, the programmer would write essentially the same code whether the subroutine is local to the executing program, or remote. When the software in question is written using object-oriented principles, RPC may be referred to as remote invocation or remote method invocation . That is the definition from wikipedia . Microsoft windows OS have this as a service and so many of its services depends on this to run. But what happens when this service is disabled or value being changed? This is what happened to me, i stupidly changed the log on from default to another account and restarted the machine. When the machine started almost all the services couldn't start no...