On Sunday my bf was using his Samsung r530 laptop as usual, his 14 year old son went on, came off and then 90% of the letters on the keyboard will not work only the numbers and everything else works, the laptop starts up Samsung recovery and we have restored the laptop to 2010 and its still not corrected this, I'm thinking something is affecting the computer but we are not very technical when it comes to fixing computer issues. Any advice would help us massively.