Hello
Sory for really late respond. I work a lot abroad, and I don’t have much time for bothering myself with this kind of problems.
I tried every solution, with no results. I also deleted everything except vallet.dat. And reinstaling wallet…
One hour ago, I was looking at the wallet and noticed, that it doesn’t find connection to servers.
I went to (in the wallet program) : Settings/Options/Network and turned on two options which are marked on the picture.

The language in the picture is my native, but it doesn’t matter the thing is the same.
The wallet afterwards synced to 100% and conected with 17 connections into network, before that there were only two connections…
I’m not a computer guy, so my explanation with proper words is very bad, but I hope that this will help if anyone has the same problems like I did…