4) Use the following Powershell Threshold code to call the functions to perform checks

Counter - "Processor % Processor Time"

Warning

StaticThresholdAvgOnly -CollectionOfCounterInstances $CollectionOfPercentProcessorTime -Operator 'ge' -Threshold 50

Critical

StaticThresholdMaxOnly -CollectionOfCounterInstances $CollectionOfPercentProcessorTime -Operator 'ge' -Threshold 80

Cheers
James