DayZ Signature Check Timeout

[Icarus619 (DayZ) 3]

Hello there,

 

I am suffering a pretty heavy problem: Signature Check timeout. 

 

I've read a lot about it and tried everything human possible to change it, but it's still here. I am now going to tell you what I've tried. Please note that I was playing DayZ since it very first steps and never had any problems before. 

 

- I first re-installed Arma II, Arma II: OA and DayZ from scratch

- Deleted Registy-entries and reinstalled again

- started with admin rights, via Steam, Without Steam etc

- i moved DayZ and Arma to another Harddrive

- I opened ports on my router

- I've set up a DMZ for my PC on my router

 

This is now where fun starts:

 

- i bought a new router, still the same..

- I changed my ISP, which means: I've moved to antoher Internet-Provider which uses another technology -> cable internet. I know have a 100mbit/s Downstream and 6 mbit/s Upstream. Guess what? -> SIGNATURE CHECK TIMEOUT!

 

I am know asking if anyone could know what the hell is wrong with my PC. I've spent a lot of money trying to solve this (New router, new internet-contract, cabel-modem and a some more things) but nothing helped here. 

Do i really have to buy a new PC? It can't be related to my internet connection anymore.. I know have a 13ms-ping to the most servers and an Upstream bigger then most ppls Downstream..