Hi brutus1234, I had the same problem some time ago, and I discovered it was caused by "WindowsXP-WindowsMedia-KB973540-x86-ITA.exe". Maybe HFSLIP 1.7.9. & 1.7.10. beta x do not correctly handle this update in respect of WMP9: at the end of the slipstreaming process (XP PRO SP3 "clean", IE6, WMP9, security updates only), I noticed that in SOURCESS\i386 folder, the files WMP.DLL and WMPDXM.DLL (contained in KB973540) are updated to version 10, not 9. So, after installation, they are not recognized as components of WMP9, which refuses to start. Problem solved putting KB973540 in \HFSVCPACK_SW1 (or, alternatively, to recover the existing installation, by extracting files for v. 9 and overwriting existing ones in \SYSTEM32\DLLCACHE and \SYSTEM32 folders of the installed XP). Ciao Lions