Question

How can we format our laptop?
Windows 10
Or install a new windows?​

Answer 1

Hey mate!!

here's your answer...

»Reset this PC lets you restore Windows 10 to factory settings without losing files:

1. Open Settings.
2. Click on Update & security.
3. In the left pane, select Recovery.
4. Now in the right pane, under Reset this PC, click on Get started.
5. Follow the on-screen instructions carefully.

»Method 2 Reformatting a Laptop Using Restoration Partition :

1. Restart your computer. While the machine is rebooting, repeatedly press the F10 key on your keyboard until the machine boots.
2. Select the option for installing a fresh system.
3. Wait for the reformat to complete.

»To install new windows :

1. Make sure that your PC is connected with CD or the drive with which you are going to install.
2. open start menu
3. click power icon -›click restart
4. Press and hold Del or F2 to enter setup.
5. Navigate to boot tab
6. Select a device from which to boot.
7. Press the + key until your boot option is first. Once either Removable Devices or CD-ROM Drive
8. save your settings
9. wait for PC to restart
10. (for installing) click next with prompted
11. click install now
12. enter your window key, then next
13. click "accept ",then next
14. click upgrade
15. click install

That's how it install, but different windows have some differences between their steps.

so be careful and for more information check on "Wikihow".