Originally posted by carlb Have I just got a dud keyboard or is there something wrong with the computer itself
You can soon answer that question. Borrow another keyboard, or buy another if only for the test. Ebay is awash with used ones as people abandon PCs for smartphones, you could probably get one for 99 pence. Even cheap new ones can be had for about £3.50 (in the UK at least).
Anyway, I'd put money on your keys sticking. Keyboard quality has been a race to the bottom, with once good names like Lenovo being hired to whatever Chinese factory bids the highest this week. I'm still using my 40 year old keyboard.