Click on the Start button and then choose Control Panel.
Click on the System and Security link.
Note: If you're viewing the Large icons or Small icons view of Control Panel, you won't see this link so just click on the Administrative Tools icon and skip to Step 4.
In the System and Security window, click on the Administrative Tools heading located near the bottom of the window.
In the Administrative Tools window, double-click on the Computer Management icon.
When Computer Management opens, click on Disk Management on the left side of the window, located under Storage.