Turn on Enhanced indexing if you regularly search for files outside Documents, Pictures, Music, and Desktop. Keep Classic if those folders cover your needs, or customize indexed locations for a middle ground. Enhanced searches a wider set of locations, but Microsoft says indexing the whole PC may use more system resources and affect CPU consumption or battery life. It does not publish a universal slowdown figure.
In Windows 11, the documented control is under Settings > Privacy & security > Searching Windows, in the Find my files section. The title’s “Advanced File Explorer Options” wording can be confusing: Microsoft documents this choice in Windows Search settings, and interface labels can change with updates.
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What Enhanced indexing changes
Windows Search maintains an index of files and their properties so it can find matches without starting from scratch for every query. Microsoft describes this like looking up a term in a book’s index rather than reading every page.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesClassic indexes Documents, Pictures, Music, and the desktop by default. Enhanced indexes the entire PC, including all user folders and files. That broader coverage is useful when you save material in locations outside the usual folders, such as a separately organized work folder. It can also include files you do not expect to search for.
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Microsoft’s Search indexing in Windows guidance explains the modes and indexing controls. The practical distinction is coverage: Enhanced searches more places, while Classic limits the default scope.
Which option should you choose?
| Option | Folder coverage | Best fit | Trade-off |
|---|---|---|---|
| Classic | Documents, Pictures, Music, and Desktop by default | Your files are mostly in those locations and current searches work well | Files elsewhere may not appear as readily in search |
| Enhanced | Entire PC, including all user folders and files | You routinely search across folders beyond the Classic defaults | Broader indexing may use more system resources |
| Customized locations | Locations you select for indexing | You want wider coverage than Classic without including the whole PC | You must choose and maintain the locations that matter |
There is no numerical head-to-head speed or resource benchmark in Microsoft’s guidance. Treat the choice as a coverage-versus-resource trade-off, not as a promise that one mode will feel faster on every PC.
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How to enable Enhanced or adjust what Windows indexes
- Open Settings, then go to Privacy & security > Searching Windows.
- Under Find my files, select Enhanced to index across the PC, or leave/select Classic for the default locations. Labels may differ slightly as Windows is updated.
- To use a narrower middle ground, use the search-location controls on that page to customize which locations are included. Microsoft also documents customizing indexed locations in its Windows Search and Privacy guidance.
- If you want to limit content indexing for particular file types, open the advanced indexing options and choose whether each type indexes properties only or properties and contents. Properties-only indexing still supports searches by file name and other indexed properties, but not by text inside the file.
Microsoft notes that limiting indexed content can reduce index size, though it can also make some files harder to find. Choose the content option based on whether you need to search inside files, not just locate them by name.
What to expect after changing the setting
The first indexing run can take up to a couple of hours, according to Microsoft; the actual time is not guaranteed and will depend on the PC and what is being indexed. Windows then updates the index in the background as indexed data changes. A search may not immediately reflect new or changed files while indexing is still catching up.
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Will Enhanced slow down your PC or drain its battery?
Microsoft says indexing the entire PC may use more system resources, and that whole-PC search may affect CPU consumption and battery life. The documentation does not quantify the effect or establish a universal performance penalty. The actual impact depends on the computer, what it contains, and its workload; enabling Enhanced is not proof that a PC will become noticeably slow.
Microsoft gives a rule of thumb that the Windows Search index will be less than 10 percent of the size of the indexed files. That is not a guarantee: the index can account for a larger share when it includes many very small files (under 4 KB) or computer code. Microsoft does not state a publication year for this estimate.
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What Windows Search indexing means for privacy
Microsoft states that semantic-indexing data on Copilot+ PCs is stored locally, is not stored by Microsoft, and is not used to train AI models. That statement applies to the semantic-indexing data described in Microsoft’s guidance; it is not a blanket statement about every kind of Windows indexing or every third-party app. Microsoft also notes that installed apps may add information to the index.
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Bottom line: choose based on where your files live
Use Enhanced when whole-PC coverage solves a real search problem. If the default folders are enough, Classic avoids indexing a broader set of locations. If neither option fits, customize indexed locations and decide separately whether Windows should index file contents or properties only.
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