After booting the computer with a network-enabled disk a start the installation with set AnswerFile=.\unattend.txt set UdfFile=.\unattend.udb set ComputerName=%1 set SetupFiles=i:\WinXP_en\i386 if "%ComputerName%" == "" goto USAGE i:\WinXP_en\i386\winnt /s:%SetupFiles% /u:%AnswerFile% /udf:%ComputerName%,%UdfFile% Everything starts OK but in the end it hangs when copying unattend.udf Any suggestions?