...why its only my ad thats not displaying properly and only on my pc.
The 'only your ad' part sounds a bit peculiar. Do you have the word ad or adwords in your Destination URL? If so, then that may be the cause.
The 'just your PC' part lends credence to the idea that it is NIS or similar. This is likely to be installed on a particular machine rather than something defined by your 'connection', in my experience.
AWA
I'm assuming it has nothing to do with the actual words as I've tried various combinations of words and even different ads relating to different subjects
Nick the tent, when I posted the following:
Do you have the word ad or adwords in your Destination URL? If so, then that may be the cause.
I was actually not referring to keywords or ad text. Instead I was referring to the 'Destination URL' that you supplied for the Ad Group.
I've heard that NIS hunts for words like 'ad' in URLs, and if you're using a tracking component in your Destination URL, like 'source=adwords', that might explain why only your ad seemed to be affected.
Just a thought.
AWA