NT4+oracle8.0.5: OCIW32.dll can't be deleted?

hi,dbas,

	i encounted a problem when i delete Oracle8.0.5 on my win2000 server.
	i first stopped the oracle service in the control panel, and then delete the entries in the registry , the the third stop to delete the oracle directory in the explorer. but the file ociw32.dll can't be deleted, with the error message" file in use.". i restarted the nt box and the error still exists. 
	what shall i do to delete that file? 
	can someone give me some advice? 
	thanks very much. 



            zhuchao
            zhuchaopku_at_263.net