I have recently imported some perfmon data into LoadRunner analysis. First of all I had to use perfmon’s relog command to convert the data into a CSV file.
I then imported this using Tools -> External Monitors -> Import Data. Which leads you to the following dialogue box.
I think this is because I had selected the Time Zone as <Local> . So I reloged the data to match the start and end time of the LR results and imported again with the Time Zone set to <Synchronize with Scenario start time>