xperia z1 gives a problem

[foutmelding]

My phone sometimes gives a problem what says error try again and then it shuts down everything im doing at that moment plz help

Also my keyboard laggs very often a bit annoying if anyone could help me out plz do

[Alexander1]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

Have you seen any pattern in this behavior? Is it when you run certain apps? 

I would suggest that you try to boot your phone into safe mode to see if the problem may be related to any 3rd party app that you have installed in your phone:

http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008