Defender: thanks for responding...tried to go into ease of access and change the turn off/on keyboard - no luck! I was able to get the keyboard off the screen but my keys still don't function normally.
Are we now talking about the main keyboard? If so, go into Device Manager, locate Keyboard and uninstall, then reboot and let the New Hardware Wizard reset device. Additionally, check under the keys to ensure that there is no debris accumulated please.
If nothing worked-deinstall, check around key pad area, removed all external devices. HAVE you tried an external keyboard to see what effects that has on operation. Could be the mat is damaged, but we cannot tell from here.
Received 4/21 message. Took laptop into repair shop as directed by Toshiba 'phone help' on 4/20. Sending back to Toshiba. Serviceman said 'sometimes' keyboard 'locks up', even on new ones and no problem for Toshiba to take care of. Will let you know if this works, in 2 weeks! Thank you again for your help. Appreciated.