Chances are that something (or someone) marked a large part of the drive and installation read-only. The database files are probably included. They'll need to be manually un-marked.
FrontPage extensions are one of the most pure forms of evil that exist in this universe. I'd highly suggest ditching it. <img src="https://www.ubbcentral.com/boards/images/graemlins/wink.gif" alt="" />
