Installation of  windows 2003 AdminPack on Vista generates errors. If you receive error "MMC could not create the snap-in." Create batch File RegisterAdminPak.cmd, you have the script bellow, and run it as Administrator. @echo off REM RegisterAdminPak.cmd REM (c) 2006 Microsoft Corporation.  All rights reserved. set filelist=adprop.dll azroles.dll azroleui.dll ccfg95.dll set filelist=%filelist% certadm.dll certmmc.dll certpdef.dll certtmpl.dll set filelist=%filelist% certxds.dll cladmwiz.dll Read more