TKPROF.EXE was not shipped with 9.0.1 and this was logged as bug# 2007918 9.0.1.1 with Abstract: TKPROF.EXE BBED.EXE WERE NOT SHIPPED, which was fixed in V9.2. So if you have the RDBMS Baseline Release 9.0.1.1.1, apply 9.0.1.2 patchset (ID:1175356 Patchset::2072050) or later as explained in the patch readme file 166926.1 9.0.1.x Oracle Database and Networking Patches for Microsoft Platforms 161549.1 Oracle Database Server and Networking Patches for Microsoft Platforms
161549.1 Oracle Database Server and Networking Patches for Microsoft Platforms