Use the Performance tab in Task Manager to see how your computer's CPU is being used by Windows and other programs running on your computer.
Open Task Manager by right-clicking the taskbar, and then clicking Start Task Manager.
Click the Performance tab.
The top two graphs show how much CPU is being used, both at the moment and for the past few minutes. (If the CPU Usage History graph appears split, your computer either has multiple CPUs, a single dual-core CPU, or both.)
A high percentage means that the programs or processes that are running require a lot of CPU resources, which can slow your computer. If the percentage appears frozen at or near 100%, then a program might not be responding. For more information, see Exit a program that isn't responding.
To view advanced information about CPU utilization, at the bottom of the Performance tab, click Resource Monitor.
If you're prompted for an administrator password or confirmation, type the password or provide confirmation. Resource Monitor shows information similar to that shown in Task Manager, but with more details. For more information about Resource Monitor when you're using it, click Help, and then click Resource Monitor Help.
Open System by clicking the Start button , right-clicking Computer, and then clicking Properties.
In the System section, next to Processor, view your computer's CPU speed and type.