Under Vista 7-Zip’s context menu extensions don’t work, everything else about 7-Zip works as normal. There seems to be something funny about the i368 version of 7-Zip when running under Windows Vista. To make the context menus work:

1. Uninstall current version of 7-Zip.
2. Download the x64 version of 7-Zip.
3. Install it.

For some peculiar reason the context menu editor is held down 10 layers of menus. I think it’s just because the menu editor is a plug-in. Hopefully, in the next release they’ll integrate this functionality into the actual application so that it’s a little easier to find. To edit 7-Zip’s context menus:

1. From the menu select Tools-gt;Options.
2. Select the Plugins tab.
3. Highlight 7-Zip and click the Options… button.
4. Select the System tab.
5. Ensure Integrate 7-Zip to shell context menu is checked.
6. Finally check any options you would like to include in the context menu.