Q: There are some files can't be deleted. What do I do?
A: Try these solutions in this order.
1. It turns out that file-names in windows 2000/XP, in conjunction with very long folder-path names, causes windows not to see the files you want to delete, hence them becoming undeletable. Moving the folder, that contains the undeletable files, to eg the c: root, will most probably allow you to delete those pesky folders with Windows Explorer. DOS usually can 't see the files at all...
4. If all else fails and you absolutely must get rid of those undeletable files, reformat the harddrive.