Over riding Windows to delete files

Up until Windows XP, I kept option to DOS boot from A: so I could destroy files that Win would not or could not. I recently discovered that XP and IE can allow save-to-disk of files longer than XP can completely handle, or with strange characters, so I can neither delete them nor rename them. This also means that folders with such files cannot be deleted.
Because XP forced me into NTFS, I can no longer DOS boot and force things to be right. The only work around I have made to date is to create a folder "_corrupted" into which I can drag files and folders that are cluttering my PC directories. I don't regain the space.
Can anyone tell me how to destroy such corrupted files, folders?
thnx

 

Move On Boot