Kluci od Apache píšou něco o tom, že máš v PC nainstalovanýho nějakýho VPN klienta, jest tak?
Co firewall, máme?

+ We have seen this problem when Apache is run on systems along with
+ Virtual Private Networking clients like Aventail Connect. Aventail Connect
+ is a Layered Service Provider (LSP) that inserts itself, as a "shim,"
+ between the Winsock 2 API and Window's native Winsock 2 implementation.
+ The Aventail Connect shim does not implement WSADuplicateSocket, which is
+ the cause of the failure.