
While that's cool, it's a small window and sometimes when Windows really bogs down and becomes unresponsive, you may not be able to use the icon in the System Tray.

You can even move the mouse around to view other spikes and identify the process. The next time a process causes a spike, just mouse over the icon in the System Tray and the pop-up will display the process name and percentage of utilization. To be able to capture past history, Process Explorer needs to be running, which isn't a problem since it can be minimized in the System Tray. Viewing the CPU graph in System Information mode, you can easily mouse over the spikes which will display the process name, it's PID (Process Identifier), the CPU usage (percent) and the exact time of the spike. By default Process Explorer displays updated activity every two seconds (which can be modified).
