Frontpage extensions are necessary to run, if you're using Microsoft Frontpage to build and upload pages to your server.
If you're using Dreamweaver, any other WYSIWYG Editor, or typing HTML right into Notepad and uploading, you don't need to be running Frontpage extensions. Think of removing them as a way of cleaning-up your account a little bit.
Login to cPanel > Frontpage Extensions (3rd/4th row down) > SEE BELOW
Either:
1) Un-install them by clicking "un-install"
or
2) Click "Cleanup Old Extensions"
Perhaps one of a thousand people will find this useful, but it's one way of getting the forum active again.