Thank you, that was the problem, however I have no idea which software uses 8080.
It is easy to change port, in windows command prompt to eg. 8081 by setting a system variable:
set OPENHAB_HTTP_PORT=8081
Then OH started normally 
Thank you, that was the problem, however I have no idea which software uses 8080.
It is easy to change port, in windows command prompt to eg. 8081 by setting a system variable:
set OPENHAB_HTTP_PORT=8081
Then OH started normally