Update error 80072f8f

[Windows Central Question]

I got this phone from finland,my friends gave it to me,and i live in serbia and i have a serbian sim card.i have updated it from windows 8 to 8.1 and from lumia black to lumia denim,but now it wont even check for updates,it says that there is an error 80072f8f.I set the correct date and time and timezone,but it still wont update.If possible i dont want to hard reset the phone.Thank you.