Windows 11 Search Not Working? Kill SearchHost.exe

SearchHost.exe is the process that runs Windows Search and it crashes constantly. I have never owned a Windows 11 machine where search worked reliably for more than a couple weeks straight. The fix when it freezes — you click the search bar, nothing happens, cursor just sits there — is to kill SearchHost.exe in Task Manager under the Details tab. Not Processes, Details. It doesn’t show up under Processes which is its own kind of annoying. Kill it, it restarts itself, search works again. I do this on my own PC at least once a week.

The real question is why it keeps dying. On most machines I’ve looked at, the answer is Bing. Windows sends your keystrokes to Bing before checking your local files. You type “notepad” and instead of just opening notepad.exe from System32 it’s out there asking Microsoft’s servers what “notepad” means. On anything slower than a 100mbps connection this adds multiple seconds of lag and sometimes the whole pipeline just gives up and SearchHost crashes.

You can kill the Bing integration with a registry edit. Open regedit, go to HKCU\Software\Policies\Microsoft\Windows\Explorer — you’ll probably need to create that Explorer key because it doesn’t exist by default. New DWORD value, name it DisableSearchBoxSuggestions, set to 1, restart. The web results section in your Start menu disappears and search becomes nearly instant. Microsoft has re-enabled this on me twice after feature updates so check it whenever search gets slow again out of nowhere. If you’re also dealing with a Start menu that won’t open, the SearchHost crash could be pulling the whole shell down with it.

When Search Can’t Find Files You Know Exist

That’s an index problem. The search index is a database that lives at C:\ProgramData\Microsoft\Search\Data and it can get corrupted or just fall behind. Rebuild it — go into Settings, then Privacy & Security, Searching Windows, and there’s an Advanced Indexing Options link. Click Advanced in there, then Rebuild. Takes maybe twenty minutes on an SSD.

I had a customer with a 128 gig laptop, 3 gigs free, and search hadn’t found any of his new files in two months. We both thought the feature was just broken. Turns out the index had silently stopped growing because there was no disk space left for it to write to. Freed up 15 gigs, rebuilt, everything came back. That one still bugs me because I spent an hour troubleshooting services and registry keys before checking disk space which should have been the first thing I looked at. If your drive is full, clearing disk space fixes search and about five other problems at the same time.

The Blank Search Window Thing

Click search, get a white or transparent rectangle with nothing in it. No search box, no recent apps. This happens because Microsoft renders the search panel using Edge’s WebView2 engine. If you ran one of those PowerShell scripts from Reddit that removes Edge, you also broke search plus Widgets plus a few other things that depend on WebView2. Reinstall Edge.

If Edge is still there and search is still blank, the search app registration itself is probably corrupted in your user profile. A new Windows user account will have working search which confirms the old profile is the problem. Not ideal but sometimes that’s what it takes.

One more thing — make sure the Windows Search service is actually running. Run services.msc and check. I’ve seen people follow those “speed up your PC” guides that tell you to disable a bunch of services without explaining what they do, and then three weeks later they can’t find any of their files. If your disk usage sits at 100% a lot, you might be tempted to disable search indexing — just limit its scope instead of killing it, otherwise you lose file search entirely. Same deal if your machine is generally slow — the fix is rarely disabling core services.