Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\>imp
Import: Release 10.2.0.1.0 - Production on Fri Aug 1 16:48:43 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Username: pde
Password:
IMP-00058: ORACLE error 12560 encountered
ORA-12560: TNS:protocol adapter error
IMP-00000: Import terminated unsuccessfully
C:\>
solution to this problem is to go directly to the bin folder of your XE install folder and execute 'imp' there.