I never imagined that a software product would be brand-dependent. For clarity, I am talking about a 3G adapter. The brand is Huawei and >50% of the adapters provided by ISPs/telecoms in Oz are same brand. These devices are the future and widely used; you support them or you are history. I am able to use the adapter on a W7 PC with the Windows firewall enabled. I am able to use the adapter on XP PCs with another, third-party firewall enabled. I cannot use the adapter on any PC with LnS enabled.