hi, i have an acer aspire v3-551 laptop, windows 8.1, 64 bit. my keyboard characters stopped working when i tried to install the elantech touchpad driver from the acer website. I tried a system restore to a previous point (multiple times to multiple points) but kept getting an error code 19 (system could not be restored msg...). I am able to access the bios menus by pressing f2, and can use the arrow keys in the bios menus, so that tells me its not a hardware connection issue. Any help you can offer would be great! thanks in advance