How to Start Windows Memory Diagnostics When Windows Is Installed

If Windows is already installed, you can start Windows Memory Diagnostics from the Windows Boot Manager menu. To do this, follow these steps:

1. Remove all floppy disks and CDs from your computer and then restart your computer.
2. If the Windows Boot Manager menu does not normally appear, press the spacebar repeatedly as the computer starts. If you are successful, the Windows Boot Manager menu will appear. If the progress bar appears, restart your computer and try again to interrupt the startup process by pressing the spacebar.
3. On the Windows Boot Manager menu, press the Tab button on your keyboard to select Windows Memory Diagnostics and then press Enter.

Windows Memory Diagnostics will start and automatically begin testing your computer's memory. For information on how to configure the automated tests, see the section titled "How to Configure Windows Memory Diagnostics" later in this tutorial.