While this forum software doesn't have a spell check yet, some browser software has it built-in for input forms.
Not all browsers have the spell check option. If you are using Firefox as your browser, click on the Firefox button on the upper left of your browser screen.
Choose "Options" then click on "Options" from the pop-up list.
On the "General" tab, "Browsing" box, make sure the check mark is in the box next to "Check my spelling"
That will give you the red underline warning and right-click spelling alternates.
I recommend switching to the Firefox browser for increased security and user friendliness. It's free.http://www.mozilla.org/en-US/firefox/new/