On Windows 11, the introduction of Semantic Indexing marks a significant advancement in the realm of search functionality. This AI-driven feature leverages Natural Language Processing (NLP) to enhance the traditional keyword-based search experience. Rather than replacing the existing Windows Search, Semantic Indexing serves as a complementary tool, enabling users to locate files, settings, and various content through conversational language, thus streamlining the search process.
<h2 class="article-bodysection” id=”section-what-s-semantic-indexing”>What’s Semantic Indexing?
Semantic Indexing employs sophisticated AI models to grasp the context and intent behind search queries. Unlike conventional search methods that depend solely on exact keywords, this innovative feature interprets the underlying meaning of queries, allowing users to discover content even if they cannot recall specific file names or keywords. For example, entering phrases like “photos from last summer” or “change my theme” yields relevant results based on the contextual understanding of the query.
<h2 class="article-bodysection” id=”section-semantic-indexing-features-and-capabilities”>Semantic Indexing features and capabilities
With the integration of Phi Silica, which processes data locally, Windows Search can now retrieve documents or images that align with the context of a query or match exact file names stored in your OneDrive cloud account. Additionally, initiating a search from the Taskbar or Start menu will also yield web results, indicating that your query may extend beyond your local device.
Enable Semantic Indexing
Users need not take any action to enable Semantic Indexing, as it is included in the Windows Search experience starting with the May 2025 security update for Windows 11. However, it is important to note that this feature requires a system equipped with a Neural Processing Unit (NPU), making it available exclusively for Copilot+ PCs. You can verify the activation of Semantic Indexing by looking for a colorful icon featuring two stars in the search box.
To further confirm, navigate to Settings > System > AI components. If the “AI Phi Silica” and “AI Semantic Analysis” components are present, your device is utilizing Semantic Indexing. While this feature cannot be disabled, Microsoft advises users to exclude any locations containing files they do not wish to index by adjusting settings under Privacy & Security > Searching Windows > Advanced indexing options.
Improve search capabilities
Although Semantic Indexing operates effectively out of the box, Microsoft recommends activating the enhanced option for Windows Search to optimize results. To do this, go to Settings > Privacy & security > Searching Windows, select the “File my files” setting, and opt for the “Enhanced” option. Once the system completes the indexing of your files, users can expect improved search outcomes.
Windows Search integration
Semantic Indexing is seamlessly integrated across various components of Windows 11, including File Explorer, the Start menu, the Taskbar search box, Windows Search home, and the Settings app. This integration ensures a consistent and enhanced search experience throughout the operating system. Notably, the Settings app is also set to receive a new AI agent designed to facilitate the discovery and modification of system settings; however, this feature operates independently of Semantic Indexing.
The AI agent aims to comprehend the issues or settings users wish to adjust, offering suggestions for resolutions. With user permission, the agent can even implement changes automatically. In contrast, Semantic Indexing within the Settings app focuses solely on interpreting search queries to surface the most relevant settings without requiring exact terminology.
Supported formats
Semantic Indexing supports a range of file formats, including:
- Images: .jpg, .jpeg, .png, .gif, .bmp, .ico
- Documents: .txt, .pdf, .docx, .doc, .rtf, .pptx, .ppt, .xls, .xlsx
Supported languages
Currently, Microsoft supports a select array of languages for the AI capabilities in search, including Chinese, English, French, German, Japanese, and Spanish.
Semantic Indexing availability
The AI capabilities for Windows Search are accessible on Copilot+ PCs equipped with Snapdragon, AMD, or Intel processors featuring built-in NPU, beginning with the release of the Windows 11 May 2025 security update. However, the rollout of these enhancements for Windows Search will occur gradually, meaning immediate availability for all users is not guaranteed. The AI agent mentioned earlier is also relevant to this discussion, although its rollout timeline remains uncertain.
More resources
For in-depth guides, troubleshooting tips, and the latest updates on Windows 11 and 10, additional resources are readily available.
