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The standard Performance Monitor that has been around since the NT 4.0 days has been continued through the life of the subsequent operating systems. There are some programs that can be used to make take the performance monitor operation from the Windows7 system. There are two other programs that we will look at that can be placed on the taskbar to do that performance check.
The first one is TaskBar Meter. It is simple to download and when extracted it will present three programs. One is the Disk IO Meter. It is designed to measure IO operations of the hard drive.
The Memory Meter
CPU Meter
When you execute the program, the icons will be placed on the task bar. The programs are designed to access operations, and display when the hardware device is maxing out.
The next program is SuperBarMonitor. It has five different performance monitors: Battery, CPU, Disk, Memory, and Volume.
Battery – Options
CPU-Status
CPU – Options
Disk-Status
Disk – Options
Memory – Status
Memory – Options
Volume – Status
Volume – Status
Like the TaskBarMeters program, when the programs are launched they can be minimized into the taskbar.
Source: http://windows7news.com/2010/03/16/how-to-add-performance-monitor-features-to-the-win7-taskbar/