All this is assuming you can still boot into Windows 11/10 in a regular way. If you cannot, the only way is to use a bootable USB drive. You can then use the advanced recovery. Reset Windows Format ...

Sorry to re-post a topic that has been discussed before, but the posts pertaining to my problem seem to be closed... I want to format my C drive and clean install Winxp Pro (this is the drive xp pro ...