Laptop keyboard suddenly not working properly

I have a Fujitsu Siemens Celsius H270 laptop. My keyboard all of a sudden started to do weird things. It worked perfectly fine before, but for two days now, my keyboard only works properly when numlock is on. However, when numlock is on, I cannot use the function keys. When numlock is off, certain buttons do not work, for example, when I press P, it writes a star instead of P, other buttons, for example: K do nothing, so when I type K, nothing is written.Also when Numlock is off, I cannot type anything into the Chrome browser's URL bar, because when for example I try to type in google, it messes up and sometimes deletes what I wrote, or leads me to another website, like Facebook.I already tried uninstalling keyboard driver then restarting laptop, but nothing happened. Yesterday, I disabled Numlock on the on-screen keyboard and it fixed the issue, but today that does not work either. Disabling Numlock in the BIOS did not work either. I know, there might be some grammatical errors, but English is not my native language. But I hope you can still understand what I'm trying to say. Any help would be appreciated.