While browsing the internet there is a spontaneous occurrence that results in the considerable slow down of the loading time for webpage requests; all websites start to load much slower. Doing nslookup results in a DNS request timed out. A system restart solves the problem for about 12-36 hours, and then this occurs again. I am running windows vista on an HP dv6700 laptop and connected through wifi to a belkin home router. I have another system that has a wired connection to that router and also running Vista without any problems. I ask for some advice from the network knowledgeable part of the community as to what could possible cause this and how to resolve this. Thank you very much in advance.