Hi, 1) Since when are you facing this issue? 2) Do you recall making any changes? This appears to be a hardware issue, contact Acer for more specialized assistance on this issue. Anatomia Humana Basica Alexander P Spence Pdf. The following steps are worth a try: You may want to check if your keyboard works before booting to Windows. To do this, you may try to access safe mode Boot the computer in safe mode. Dhanni Meye Serial Cast there. To do this, follow the steps below: Access the Advanced boot options menu by turning on your computer and pressing the F8 key continuously before Windows starts. On the advanced boot options menu select Safe Mode Advanced startup options (including safe mode) Let me know if your keyboard works in safe mode.