Thank you for replying so quickly. Yes, I've tried those options and still get the distortion. I definitely just get the two 'pixel' choices. By the way, the netbook in question is a Dell Mini (I don't put it in my signature as I usually only use it to take away on trips etc.) If I had to describe it, I'd say that it's all a bit 'elongated'. Perfectly legible and I can live with it, but I'm curious about how this happened. I know that at work when we plug a computer into an interactive board the display is temporarily similar but then goes back to the original size. Anyway, I'll have another go at resolving this tomorrow.
Footnote: I've just tried my Admin account and there are more display choices in 'My Computer' so it's a case of trial and error, I fear. Aren't computers wonderful!!
Dell Studio 15 with Win7 64bit and 4GB RAM
IE9 and Live Mail
BT Infinity via HH3