I'm trying to automate Windows Search indexing exclusions. The older indexing interface can recognize file extensions registered by applications, while the newer Settings page lets users exclude folders from indexing. I'd like to add my own folders—and ideally exclude files by suffix—using a script rather than clicking through the UI. I found the relevant CrawlScopeManager data under `HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows SearchCrawlScopeManagerWindowsSystemIndexWorkingSetRules`, but it doesn't appear safe or practical to edit those entries manually. What is the supported PowerShell, COM, or other programmatic way to create and save these exclusion rules?
2 Answers
For a scripted solution, use the Windows Search COM API instead of modifying the registry directly. Create a `Microsoft.Search.Manager` COM object, obtain the Crawl Scope Manager, add a user-scope rule for each folder you want excluded, call its `Save` method, and then restart the Windows Search (`WSearch`) service if necessary. This is the supported-looking route for managing crawl-scope rules programmatically.
The registry location you found is the right area to investigate: `HKLMSOFTWAREMicrosoftWindows SearchCrawlScopeManagerWindowsSystemIndexWorkingSetRules`. There are also PowerShell approaches that add a folder to Windows Search’s excluded paths. Directly editing the registry can be fragile, though, so treat it as a reference rather than the preferred automation method.
That helped narrow down the search considerably. I had been looking in completely unrelated registry locations before.
That’s a useful starting point. The Settings interface also seems unreliable in some cases—folders removed from the exclusion list can come back after a restart—so I may need to explore the COM approach further.