In their own words...
- it's started very early (4th application - the first 3 are required Window Mobile applications) in the startup process, allowing a better control over what and when it's allowed to run.
- while entering SafeMode, it stops all known 3rd party application types, such as:
- Services - these are system applications; they are not visible with the task manager, and generally run in the background
- Startup applications - startup links, placed in "Windows\Startup"
- Home plugins - SafeMode 2 disables all Home plugins, replacing it with it's own interface, as a reminder you're running in SafeMode
- Pocket Internet Explorer plugins (such as MultiIE)
- Other extensions, found in system registry
You can read more at the SafeMode 2 for Smartphone homepage, where you can also download a trial or purchase the application for an insanely cheap $6.95, or $9.95 with the Pocket PC version included too!