Laptop Keys are mixed up

hello, i have Dell inspiron 17 and im typing with my touch screen keyboard right now . i don't know what happened but many keys are now mixed up. here are the ones with problems ; 

L= mute (F1 is the mute button but now it puts my laptop to sleep) 
F2 is to lower the volume but now left ctrl also lowers volume 
F3 should increase volume but now it is like right click of mouse 
letter O does not work 
F11 should lower brightness but now shows the question mark( ? ) 
when i press 6 it shows the + instead of 6 

i did a system restore to few days back but that didnt help
my keyboard is already set to english US. windows 8.1

Not 100% sure but i think this problem started after i unplugged it from my tv then put it to sleep mode and after opening the laptop again, instead of booting to homescreen , the laptop restarted itsef and thats when i noticed the problem