Tony,
Internet explorer is referred to as IE.
Am using version 8 as I also use Windows XP.
If you click on 'help' (on 'third' line down which also shows file, edit, view, favorites, tools, help ), then click on About internet explorer, it will tell you what version you are using.
Try and spell check on mayhem, and look at the very top of IE to see if a line appears across the top saying words to effect pop up blocked etc, if so right, click on that line of words an select allow.
You may lose the message, but if you do it again the spell checker should work and you can then post.
Hope this makes sense, I also am not too literate with PC's and maybe one of the resident Gurus on here can explain it more simply.