For some unknown reason, i suddenly can switch on WIFI anymore on my Galaxy A5. When i try to switch it on, it automatically switches back to 'off'. I didn't install any app, i didn't make any modifications to my settings.
I tried to check if there were any software updates to install, but when I ask for a manual update, i get an error message telling me that the operating system had been changed in an unauthorised way. I am asked to try install the updates with Smart Switch on my PC, but Smart Switch doesn't offer me the possibility to install any software update.