You leave us with very little clues. Could you give us the details of your error? If you move your mouse over to the red(read?) icon, do you see any more detailed error?
Any message logs around the time would be nice too!
Hello Jinmo ,
I have updated my question with a screenshot of what i am seeing.
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PI SMT shows performance counters items from windows performance counters.
So it is good troubleshoot to open windows performance monitor to see the item that gets an error.
If you cannot see the value from windows performance counter, then it means that the machine has problem for this counter item.