Hi All Apologies if this has been posted before. I have just turned my iMac on for the first time, unfortunately there is an issue with my wireless keyboard The 'R', 'F' and 'V' keys are non-responsive. It appears to be only that chain that doesn't work. I was wondering if there is a quick fix to this, or whether I'll be heading back to the store. Unfortunately I require these keys for my registration details, so I can't get past this screen until it's resolved. To make it worse, as this is my first Mac I don't have a spare keyboard. thanks.