Thanks everyone for your suggestions,
I answer indvidually to each of you.
You have to know, that unfortunately I just have sometimes the possibility to check HFS with a friend - generally I use the "Self Test" here, to find out, if HFS is working for me.
Also I have to say, that I use PeerBlock, but for all this tests, I disabled it too.
bmartino:
Yes, HFS is added to windows firewall (I set it to access enabled). I control windows firewall with WindowsFirewall Control, a tiny program, witch is just a better way to change windows firewall settings.
When I did my tests, I tried to disable firewall and antivirus completely, but nothing helped.
Also I re-added the files and the file(s) are just normal files without any special permissions and also in a free accessible location in the file-structure of windows (no folder in programs for example).
Leo:
Yes, I tried with 8090 as well (I will upload screenshot too), but nothing changed. Port 80 is always open for my browser, other ports normally closed, but for testing I opened all.
Rejetto:
The adress I gave to my fried some days ago was exactly the adress, I could see in the row on top of HFS "Open in browser:
http://192.xxx.xxx.1:8080/Examplefile.jpg"
In the -PAST- I always gave that adress with immediately success.
I personally think, that only verifying of internal HFS Logs can maybe tell the reason, why HFS can't connect to the net.
All internet-access related programs are disabled for testings HFS without success, therefore I maybe need to deinstall them, to see, if that helps.