Hi I have a Sony VAIO VGN-FW378J laptop. it's been around 2 years since the problem has started. the D button on my laptop keyboard won't work sometimes, most hit it several times to type, sometimes even if i punch it won't write and sometimes it will write double D, now after 2 years from that problem i have several keys with that problem but better than the D key situation, V,H,C,K,Right arrow, Space and left control. I've opened the right and left arrow key cap and and there was no difference between them, could it be a software problem or it's from the board? I'm using Windows 7 ENT 64-bit with all drivers installed, I've same problem in Windows 10. Thanks in advance.