Windows 10 format

[Adam Boucher]

How do i format a hard drive but leave the OS (Windows 10) on it?

[WAR Corporation]

What do you mean?

Do you want to reinstall windows 10? Erase all data?

[RUWO_builder]

you cant. the point of formatting a drive is to remove all data really wel. you can however reeinstall windows 10 after(without needinng to buy it again). you could also defragment the drive if you just want clean it up.