I guess there are already threads dedicated to this subject - which files and folders you can safely delete from a Windows XP partition without having any problem. Unfortunately I cant'd find them ...

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Warnings While removing a drive letter for a network drive or virtual drive doesn't delete any files, it may cause errors in applications that try to retrieve a file using the deleted drive letter.

Wondering what really happens when you delete a file on Windows? Learn how deletion works, where files go, and if you can recover them.