Trouble with some services

[Octopuss]

I'm trying to force W7 to install with Search, Prefetch and Superfetch completely disabled, so that no indexes are created, and no files ever appear in \ProgramData\Microsoft\Search and \Windows\Prefetch.

I apply this to the registry of the mounted image:

[HKEY_LOCAL_MACHINE\WIM_System\ControlSet001\Control\Session Manager\Memory Management\PrefetchParameters]
"EnableSuperfetch"=dword:00000000
"EnablePrefetcher"=dword:00000000
"EnableBootTrace"=dword:00000000,

and in setupcomplete.cmd I have

sc config wsearch start= disabled
rd %ProgramData%\Microsoft\Search\Data
sc config sysmain start= disabled

and yet, the Windows Search service, even though it's disabled, is running after the system boots up for the first time, and the above mentioned folders are ripe with files.

I don't know what's going on. Can anyone help me?