How to Scan Your Hard Disk

Using scandisk to scan and correct errors to your Windows computer can fix damage caused to critical Windows files, improving system performance in the process

To start.
1.)click on Start Menu
2.)select Run
3.)on the dialog box enter sfc /scannow
4.)After you enter it Hit Enter or click ok
5.)Wait until it finish to correct some error

Windows will scan your disk for any problems in your system files. If any errors are found, follow the instructions on the screen.