How do I erase everything on my computer windows 7?

Select the Settings option. On the left side of the screen, select Remove everything and reinstall Windows. On the “Reset your PC” screen, click Next. On the “Do you want to fully clean your drive” screen, select Just remove my files to do a quick deletion or select Fully clean the drive to have all files erased.

How can I format my laptop Windows 7 without CD?

Step 1: Click Start, then select Control Panel and click on System and Security. Step 2: Select Backup and Restore displayed on the new page. Step 3: After selecting backup and restore window, click on the Recover system settings or your computer. Step 4: Select Advanced recovery methods.