Great news I have found the issue. Issue is with QtWebEngine that Packet Tracer is using. It looks that it need some libraries from DirectX. When I installed 'DirectX End-User Runtime Web Installer' (maybe I had some old version) everything start to ...

Hi, thanks for advise. I tried this but unfortunately I still have black window

Hi, Thank you for your reply. I have windows 7 and yes I did disable the firewall and antivirus. This issue is quite strange because under this black layer (window) there is some content. When I'm moving mouse around it change the cursor to 'pointer'...

I did. I installed v.7 but the same black screen. I cannot go lower as v.7 have some function that I need. Maybe some another advice? 

why no body is providing support with this issue. I was searching internet and see that many people have this problem and Cisco did not do anything with it. I'm using v.8. I tried to run as administrator and nothing.