Need help with my galaxy s3 mini!?

[AC Question]

I've had my 'Samsung galaxy S3 mini' for a year and it's just started to play up, the button next to the the home button, think it's called the menu button, keeps coming up on the screen without me even touching it, & also when I touch one of my apps like Facebook, twitter they come on for like 2 seconds then close on their own, would be a big help if someone could tell me what the problem is thanks

 

[B. Diddy]

Try booting into recovery mode and wiping the cache partition: http://forums.androidcentral.com/sa...ing-into-recovery-mode-galaxy-s2-s3-tab2.html