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I recently did an in-place upgrade from Windows 10 22H2 to Windows 11 24H2 (26100.4351) on two Lenovo boxes. In both cases, the search index was wiped and indexing starting from scratch. On my older box (a 2020 X1), indexing is going at a reasonable speed, between a few hundred and a few thousand entries added to the index per minute. On my newer box (a high-end 2025 P1G7, Intel Ultra 9 185H/2300MHz/16 Cores, NVIDIA GPU, 32GB RAM, 1TB SSD), indexing is going at a snail pace--often only one item per minute, sometimes a few dozen.

So far I've tried:

  • Windows Update
  • Lenovo Update
  • Intel Update
  • sfc /scannow
  • dism /Online /Cleanup-image /Restorehealth
  • deleting registry key [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Search\PluginResourceData]
  • removing everything from indexing other than Outlook email
  • disable index backoff
  • attempting to reset search this way:
dism /online /Disable-Feature /FeatureName:"SearchEngine-Client-Package" 
reboot
rm C:\programdata\Microsoft\Search
reboot
dism /online /Enable-Feature /FeatureName:"SearchEngine-Client-Package" 
reboot

None of these seem to have any impact on glacial indexing speed.

The only other tip I've seen but haven't tried is reinstalling from an ISO.

Anything else I can try to fix or at least further diagnose what is going on?

Adam J. Kessel
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1 Answers1

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I think I've found the problem. It appears the search indexer was indexing Public Folders in Outlook, which are not stored locally.

It is non-trivial to disable indexing public folders -- as best I can tell, this can only be done programmatically via the crawl manager API, but once I excluded those folders from the search scope, the indexing speed increased from 1-10 items per minute to about 1,000 items per minute.

Some details on programmatically modifying crawl scope can be found here.

Giacomo1968
  • 58,727
Adam J. Kessel
  • 173