I've just installed NOD32 ver 2.51.26 on a laptop. There is about 30 other PC's on the same LAN with NOD32 installed and updated without any problems, but this particular PC will not update. Ive recieve this messages in the eventlog: Update attempt failed (Server connection failure) Error connecting to server www.nod32.com Error connecting to server u5.eset.com Error connecting to server u4.eset.com (and so on with many different servers) Update: Problem solved. When I installed NOD32 the computer was using a proxy-server and NOD32 automatically adoped those settings. After turning off the proxyserver in NOD32 update-settings everything works just fine.