Is it safe to delete this file from my desktop? (Microsoft.Services.Store.winmd)

Microsoft.Services.Store.winmd is a Windows metadata file used by some Microsoft Store-related applications or development components. A required copy would normally be stored inside an application or system folder, not loose on the desktop.

If the file shown in your screenshot is genuinely located on the desktop, it is most likely a leftover file created or extracted during the Okular installation. You can test it safely:

1. Right-click the file and select Properties.
2. Confirm that its location is your Desktop or OneDrive\Desktop, rather than a Windows or application folder.
3. Move it to the Recycle Bin instead of deleting it permanently.
4. Restart Windows and test Okular and Microsoft Store.
5. If everything still works, you can empty the Recycle Bin later.

Do not delete another copy with the same name from folders such as WindowsApps, Program Files or a Windows SDK directory.

If the file returns to the desktop, an installer or updater is creating it repeatedly. In that case, uninstall Okular and reinstall it from its official source. The timing suggests Okular may have created it, but the filename alone does not prove that.

A .winmd file contains Windows Runtime metadata; it describes APIs and types but is not a document. Its appearance on the desktop after Okular suggests a copied installer or packaging artifact, but the filename alone cannot prove whether that copy is needed. Open Properties and verify its location, size, creation time, and digital signature, then scan it with Microsoft Defender. Do not remove similarly named files from Windows, Program Files, or an application folder. For the desktop copy, create a test folder outside the desktop and move the file there rather than deleting it. Restart, open Okular, test Microsoft Store, and install one app update. If everything works later, delete only the moved desktop copy. If Okular fails, restore it and repair or reinstall Okular from its source. If Windows blocks the move or reports that the file is in use, do not force deletion; identify the referencing process first.

Yes, it's safe to delete.

icrosoft.Services.Store.winmd is a WinRT metadata file — it just describes the Microsoft Store API types/interfaces so that apps and tools know how to talk to Store-related APIs. It contains no actual code or executable logic, just type definitions used by language projections at build/compile time. On its own it does nothing and runs nothing.

Files on the Desktop are not system-critical; Windows doesn’t rely on anything there to boot or run core services. During that okular process, some installer step likely extracted the .winmd file, and Used the Desktop as the default/current directory instead of a proper temp or app folder.