If you are creating text to be added to a website and/or other application you may want to create it using your resident e-mail program or text editor instead of creating it in Word. Firstly the spellchecks might be better secondly Word sometimes adds unwanted formatting.
If you are having issues with unwanted formatting and already have created text in Word or other application that you suspect adds formatting – copy / paste it into new email, highlight it all and set it as “Plain text” instead of “Rich text” (all old formatting will disappear), run a spell check and then copy / paste it over to your web-post or article. Now you can mark up selected text to bold, headings etc. easily without having unwanted old formatting (and code that slows down the load time of your post/page).