saving files to c: and renaming folders

Pure Heart

hi

although i log in as domain user wich is member of local administrator the
OS dont give me athority to save files to drive C: or rename folders in it my
OS is Vista Ultimate

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Ammar S. Mitoori
IT Head QIMCO Co.
Tel : +9744831199
Mobile : +9745378400
Fax : +9744831643