I had the same problem. If your letters show up as numbers then the nums lock should help. If your letters show up as the wrong letters, nums lock may not help. What I did was right click on the windows task bar, then clicked on toolbars and selected language bar. This should make a little keyboard show up on the windows task bar. Click on the keyboard and it should show u the diff language settings for the keyboard. I simply selected English - USA and violla, it was back to normal.