Computer Hope

  Need instructions how to remove EVERYTHING from computer
   to install windows 11 home ?

If you're installing Windows 11 from a disk it should over-write the previous OS. If you want to completely wipe the hard drive you can use DBan. here. This will completely wipe your hard drive. I'm curious why you want to wipe the hard drive.

 Because I did not know that W 11 will over-write the old operating system.

  (I also do not know how to delete a posting I made on this forum)