Hi. I have Avast home 4.8 installed on a Vista laptop, an XP desktop and an XP laptop. The first two work fine but I cannot update on the XP laptop....the update process always says it cannot connect to server. This happens on auto or manual update. All machines are connected to the same Netgear DG834GT router, desktop cabled and both laptops wireless, and all run Zonealarm with the same programme settings for Avast. Help!!!