Hi. My name is***** you for your question and the opportunity to assist.
Give this a try: hold down the power button until the laptop completely shuts down. Until
all the lights go out and you can actually hear it shut off.
Remove the battery and disconnect the a/c adapter.
Hold down the power button for 30 seconds and release.
Reconnect the a/c adapter only and then power it back on. This should force Windows to
start from scratch.
If after this the keyboard still is not responding hold down the power button once more to shut the laptop down.
Power the laptop back on and while the manufacturer's logo is still onscreen start steadily tapping the F2 key to enter the BIOS.
Once on the setup screen use the arrow keys to select the Configuration section.
In the Configuration area look for the Legacy USB setting. Enable it and press F10 to exit and save the changes.
The laptop will restart and you should have use of the keyboard.