What advanced hardware tests can reveal intermittent Dell or HP laptop?

Normal Windows diagnostics often focus on basic checks such as memory tests, disk health, battery status, and driver-level reports. These built-in tools can miss intermittent issues that only appear under specific thermal, power, or load conditions. For example, a laptop may pass a standard Windows memory test but still fail when the system is under sustained load or when the GPU and CPU are both active. Advanced hardware tests can stress individual components, monitor voltage rails, check thermal thresholds, and log errors over time, which helps reveal problems that standard diagnostics do not catch.