1. Performance Monitor
Allows you to see what applications are taking up what processes and how much they are taking.
2. Reliability Monitor
Allows you to see a history of your system and a timeline of events and errors that occurred during a given time period. The blue line is an estimate from 1 to 10 of how stable your system is over time.
3. Resource Monitor
A way to view real-time data about your system and is usually used in conjunction with the Performance Monitor.
Checks the file system and file system metadata of a volume for logical and physical errors.
Loads the device and gives it a stress test
Tests the device's ram
Tests the devices hardware