No, I can't get anything to change for the Windows folder either. But then I did not need to in order to get all the things applied from the "tweaked to dead" topic.
Indexing to my c: drive is off for sure.
Ah, but you can wonder whether that succeeds by means of my suggestion : apply to all files or whatever it exactly is. I sure can imagine that this can't be applied to the c: drive because it really physically goes through the files and amends something (I think). And that won't be allowed for the Windows folder ...
To be honest, I can't recall that I did this for the c: drive. I was always more bothered by the data drives, and by pure coincidence my Galleries (which is a million of files) are not on c: but on d: though the same disk. You indeed they could be shut off, and I'm sure I did "those" (hence d:). It took over an hour iirc.
I just wanted to try it for you, but didn't dare to press the button. I mean, my system *is* dead quiet, and it could only get worse. And before being able to shut indexing off the proper way, it has to be turned on, right ? So ...
Btw, my poor Vista still has the 1000 for a standard (something's really wrong there, but aparently it doesn't bother for audio playback).