I use Com Port for communications for a test board and the Intel Active Management Technology is using Com Port 3. IS it possible that this is slowing down communications to the test board. It seems after every third or fourth entry in the test board software the system pauses for about 45 seconds for reasponding back, could this be caused by the AMT?
This could possible be caused by a COM port conflict. Please reference the following blog on how to change the AMT seriel COM port and see if that resolves your issue.