One has to love the world of windows. Windows Search 4.0 is a great search software, except for mysterious reasons it failed to work on my desktop. After much scouring the web forums, and reinstalling and installing many times, I could not get it to work. All I got was:
Unable to initialize the filter host process. Terminating. Details: Access is denied. (0x80070005)
Finally, I used procmon (from Sysinternals) to look for what was going on. By looking for ACCESS DENIED results for Process named "searchfilterhost", I found out that it was failing on C:\Windows\Registration\R000000000010.clb . No mention of it on any websites. Renamed that file and everything worked. What the purpose of that file is, is a mystery for now.
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