Yes, that's fine. The problem definitely lies with HFSLIPWU.INF; it is incomplete. Can you do two tests? Test 1: 1) Run HFSLIP with ONLY WindowsUpdateAgent20-x86.exe in HF 2) Afterwards, open HFSLIPWU.INF from SOURCESS\I386 and search for occurances of "regsvr32" Test 2: 1) Run HFSLIP with all hotfixes EXCEPT WindowsUpdateAgent20-x86.exe 2) Afterwards, open HFSLIPWU.INF from SOURCESS\I386 and search for occurances of "regsvr32" Do you get results for "regsvr32"? (Y/N)