This is my RunOnceEX.cmd script: cmdow @ /HID @echo off SET KEY=HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceEx REG ADD %KEY% /V TITLE /D "Installing Applications\" /f REG ADD %KEY%\005 /VE /D "Adobe Reader 6" /f REG ADD %KEY%\005 /V 1 /D "%systemdrive%\install\Applications\AdobeReader6\AdbeRdr60_enu_full.exe -p"-s /v\"/qn\"\"" /f REG ADD %KEY%\010 /VE /D "Diskeeper 8" /f REG ADD %KEY%\010 /V 1 /D "%systemdrive%\install\Applications\Diskeeper\setup.exe /s /v/qn" /f REG ADD %KEY%\015 /VE /D "Nero Burning ROM" /f REG ADD %KEY%\015 /V 1 /D "%systemdrive%\install\Applications\Nero\nero63120.exe /silent /noreboot /no_ui /sn=xxxx-xxxx-xxxx-xxxx-xxxx-xxxx /write_sn" /f REG ADD %KEY%\020 /VE /D "Flashget 1.6" /f REG ADD %KEY%\020 /V 1 /D "REGEDIT /S %systemdrive%\install\Applications\Flashget\fgf160.exe /s" /f REG ADD %KEY%\020 /V 2 /D "REGEDIT /S %systemdrive%\install\Applications\Flashget\register.reg" /f REG ADD %KEY%\030 /VE /D "WinRar 3.30" /f REG ADD %KEY%\030 /V 1 /D "%systemdrive%\install\Applications\WinRAR\wrar330.exe /s" /f REG ADD %KEY%\040 /VE /D "WinISO 5.3" /f REG ADD %KEY%\040 /V 1 /D ""%systemdrive%\install\Applications\WinISO\winiso53.exe /VERYSILENT /SP-" /f REG ADD %KEY%\040 /V 2 /D "taskkill /F /IM WinISO.exe" /f Of these apps only Nero and Winrar actually install. Diskeeper - an error message saying it can't find setup.exe . When I check the folder, it is indeed not there: instead there is a corrupted file $temp$.~~~ . The file on the XP CD is fine and runs properly. I don't understand why the corruption. It's as if it stopped copying the file in the middle. For Acrobat, Flashget and WinISO - there is no error message. They simply don't install, even though they are properly copied to the HD. The switches I use are from this board and the main page. Any ideas? Thanks.