CPU usage refers to the percentage of a computer’s central processing unit (CPU) that is being used at any given time. Monitoring CPU usage is important because it can help you identify performance issues and determine if you need to upgrade your computer. There are a few different ways to check CPU usage on a Windows Vista computer.
One way to check CPU usage is to open the Task Manager. To do this, press Ctrl + Shift + Esc. In the Task Manager, click on the Performance tab. The CPU usage graph will show you the percentage of CPU usage over time. You can also see the CPU usage of individual processes by clicking on the Processes tab.