> For the complete documentation index, see [llms.txt](https://chaoses-ib.gitbook.io/directory-opus/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://chaoses-ib.gitbook.io/directory-opus/manual/release_history/opus13_detailed/shell_extensions.md).

# Shell Extensions

**Shell Extensions**

* (Configured via Preferences / Miscellaneous / Shell Extensions.)
* Categorised, searchable list of all shell extensions installed on your machine.
* Shell extensions can be blocked via UI. Replaces old Advanced settings (ignore\_context\_menus/allow\_context\_menus).
* All extension types can now be blocked, not just context menus.
* Lets you see any installed extensions which are blocked by default, allowing you to unblock them.
* Lets you see any extensions which were automatically blocked due to a previous crash.
* Similar to NirSoft's ShellExView tool, but built-in and only affects Opus. ShellExView, AutoRuns, or similar should still be used for system-wide blocks.
* Menu (top-right "hamburger" icon) has several options for tech support:
  * Block a specific shell extension by ID, without having to find it in the list.
  * Save a file listing all shell extensions on the machine.
  * Import or export a list of blocked shell extensions. (Doesn't include ones blocked by default.)
* Option to run context menu extensions in a separate process (when possible). Helps isolate Opus from bugs in unstable third-party code.
* Option to hide Windows and third-party menu items has moved here.

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Next: [Miscellaneous Features](/directory-opus/manual/release_history/opus13_detailed/misc_features.md)