An attempt to do an operation on a debug port failed
because the port is in the process of being deleted.
The DebugPort specifies a debug connection to the system
kernel (a system under test) via a serial (rare today), USB
or FireWire connection. The connection has been turned off, but
a request was made to continue to use it.
How to resolve it:
A. Use system restore to set the system back to a time before the problem started.
B. Repair install XP operating system.
C. Did you recently add drivers or hardware to your system?