[Windows Central Question]

all the system apps like calendar or email became something like that, and most of others are just became a color block. none clickable. restart wont help.

please help!

[ssapre]

put the phone connected to wifi or data network, open store and from settings hit check update. Most probably all those apps will be kind of re-installed and you should be good in some time (time depends on your network speed :D )
Also if this phone has memory card, try to scan the memory card when you restart the phone and it shows a message that card needs re-scan.