If all else fails, you may need to reset your Droid 2—that is, delete all of its data, and return it to the state it was in before you bought it, with all the factory settings replacing your own. Your contacts, social networking accounts, email and email accounts, and so on all get deleted.
A factory data reset doesn’t delete files you have on your SD card, which means that your photos, videos, and any other files stored there will stay intact after the reset.
To perform a reset, press the Menu key from the Home screen or a pane and tap Factory Data Reset. That erases all the data on your phone.
Before you perform a reset, when you’re on the privacy settings screen, tap “Back up my data”, as described on Privacy. Your settings and other application data get backed up to Google’s servers. Make sure that the Automatic Restore option is also chosen. That way, after the factory reset, the Droid 2 automatically restores the data and settings.