To determine the amount of RAM you'll regain by disabling unnecessary system services, use the Windows Task Manager. Here's how: Before you disable any system services, reboot your system and don't launch any applications. If you have applications that automatically load when you start Windows, hold down the [Shift] key to bypass the Startup folder. Then, right click on the task bar and select Task Manager from the shortcut menu. When you see the Windows Task Manager dialog box, select the Performance tab. Now take note of the Available value in the Physical Memory panel. After you disable those system services you deem unnecessary, reboot your system in the same manner and compare the Available value in the Physical Memory panel to the one that you noted earlier.