When enabling monitoring for

QOS_WIN_PERF / Object: LogicalDisk / Counter: % Idle Time / C: or Total, or ANY instance, data gathered is not correct.

It shows every 2, or 3 polls the value of 0 when the counter seen in the windows performance monitor never actually drop from around 95-100%

Steps to Replicate:

1. Deploy ntperf on windows 2012r2

2. enable monitoring inthe ntperf probe for: 

QOS_WIN_PERF / Object: LogicalDisk / Counter: % Idle Time / C: or Total, or ANY instance

3. Set poll every 300 seconds. 

4. See results in DB. 

Expected Result: Every poll should show value similar to what we see in windows perfmon

Real Result: Good results are only shown every 3/4 polls. For 1 good polls you can see 2 or 3 polls showing value of 0