I have a Dell notebook which has been used for three or four years. Win7' s system is very slow now How to improve the speed or restore the factory settings? Thank you.

Hello, the method of restoring factory settings is as follows:

1. Before booting into the system, quickly press F8 to enter the advanced startup option of Windows 7 and select "Repair Computer".

2. Select the keyboard input method (generally keep the default and confirm it directly).

3. If there is an administrator password, you need to enter it; If no password is set, just "OK".

4. After entering the system recovery option, select "Dell DataSafe Restore and Emergency Backup".

5. Select Select Other System Backups and More Options, and then click Next.

6. Select "Restore My Computer" and click "Next".

7. After selecting the correct factory image, click Next.

8. If you choose not to back up important files and confirm, you can start to restore the system to the factory state.

Note: During the recovery process, you need to connect the laptop with the adapter, and then restart the computer.