Well, sleepless, it seems LimeWire does not like me so much....

I did not work, although I followed your instructions. The only difference now is that I dont get Tcpip warning messages anymore on Edit Viewer when the error occurs, apart from that the problem remain the same.

I stopped wondering about what could cause the error, cause I dont got a clue, but I stumbled upon LimeWire in the "Add or remove Programs"-window and it says its size is 1.284,00 MB big (!). Is that possible? Maybe it has something to do with the whole thing (Sherlok Holmes style....)?