Hello, I am using ESET Smart Security 4.0.474 on a Windows XP SP3 machine. When I start my PC, everything works fine. After a while, there is not exact period, I cannot surf the web or read emails anymore. ESET user interface is working but I cannot see any data in it. Even the about box, where the module versions appear is empty. But I can ping sites and I can reach other computers in my network. It seems that the ESET background service fails and blocks every communication outside the network. Any suggestions?