1, first back up important things to the mobile hard disk or network disk;

2, 8gu disk and do a startup program;

3. Download the Ghost file of win7 Ultimate System.

Reinstall the system as follows:

1, prepare to bring your own USB flash drive, not too big, 8GB, and then download and make a USB flash drive to start, copy the system to the USB flash drive Ghost folder, plug in the computer to start, and choose to start from the USB flash drive;

2. When the notebook appears the boot screen, continue to press F2 to enter the BIOS. Different models and brands have different shortcut keys. If you can't try F 12 or Del. Select boot from USB flash drive and enter PE, and the following figure will appear. Move the up and down keys to select the first one and press Enter;

3. Enter the following PE interface, and an automatic ghost box will pop up automatically;

4. Select the copied system on the U disk, choose to install the system on the C disk and click OK;

5. After confirmation, wait until the progress bar is full, and then shut down and restart.