[imdarkside]

start>settings>systems>clearstorage>1234>enter or
hold red and green buttons on front (send/end) at same time as you push stylus in the hole in the bottom of phone, keep holding end send and take out stylus, at prompt press enter.
Be sure to back up what you want to keep, use backup like pim to back up to sd card, sd card will not be erased. hard drive will be erased back to factory settings. you can restore backed up stuff using pim (contacts, texts, calendar, etc..)

Finally press the green "thanks" below this post.