|If this a laptop that was new when you got it, and you're sure you haven't done anything to damage it, and you're sure your Windows settings are correct, it sounds like it's keyboard is defective. You have the symptoms often exhibted by a laptop keyboard that has been used so much some of it's keys no longer work every time you press them. |
If the onboard keyboard doesn't behave correctly because it's keyboard controller is defective, an external keyboard may not behave correctly either.
If you bought the computer locally, the place you bought it from may have a limited time exchange policy - e.g. for 60 days. If so, you could exchange your laptop for a new one - if you want to keep the data you have on the hard drive that you have added, you should be able to swap hard drives.
If you didn't buy it locally, some places online have a similar policy.
If you don't qualify for any such policy, have a local laptop repair place that is authourized to work on Acer laptops diagnose your laptop - it should qualify for a free repair under it's warranty.
By the way, I have recently discovered you can order Recovery media (recovery disks) for your model from the Acer web site for only three years after the unit was made. For HP and Compaq, that's five years.
If this is NOT a new laptop, laptop keyboards are a frequently replaced item and relatively cheap to buy new on the web. Replacing the onboard keyboard may fix your external keyboard problem too. You would need to search using the proper part number. I recently took apart an Acer laptop that is about three years and three months old - the part number label is on the bottom side of the keyboard - you don't have to open up the case to remove the keyboard - it's easily removed, but it has a ribbon cable that has no connector on the end that plugs into a connector - you have to be careful when you unplug it, and even more careful when you plug it in.
For that Acer laptop, it's USB ports and keyboard recently stopped working - it boots fine but you can NOT get the keyboard to work, and an external keyboard doesn't work either - the latter should, according to it's Owner's manual. The owner claimed as far as he new the laptop had never been dropped (he's the third owner), but I found evidence it HAD been dropped when I took it apart. The LCD display has not worked on it for at least a year, but an external monitor works.