my 8310 go crazy need advise

I got a bb 8310 suddenly go crazy It will turn on and work for a little while. Then all of a sudden it will go crazy.
It will open up apps, make calls send txt messages all by it self.

Any comment what will i can do?

Thanks,

Battery pull with device on, if that does not work maybe reinstall your os. Have you installed any 3rd party software or have left some apps running? Also check your memory to see if it is low.

You might need a young priest and an old priest.