How to: Turn off automatic spell checking.
Solution:
Select 'Options...' from the 'Tools' menu and clear the 'Automatic Spell Checking' check box.
NOTE: Automatic Spell Checker is enabled by default.
To disable Automatic Spell Checking:
1) Select the 'Tools' menu and select 'Options...'. (The 'Options' dialog box appears.)
2) Click the 'Spelling' tab.
3) Clear the 'Automatic Spell Checking' check box.
4) Click 'OK'.