This may help them on WinXP!!!!!!! Do not disable DNS in services as this will severely affect your surfing and download speed. It will restrict the speed you can download to nearly half the speed by disabling it.
DNS is used to look up the address of a site, i.e. convert click here to 126.96.36.199 or whatever it is. This usually comes from your ISP DNS server anyway. It can't possibly affect download speed, which is dependent on the type of connection you have, quality of line etc.
I think that woodchip is referring to the fact of the DNS keeping the name in the cache so that your PC will look there first rather than having to go and search for the number then convert it to a web address. So in effect it will be quicker.
I think I've understood the function correct but not absolutely sure. j.
By default, the resolver accepts responses even from servers it did not query. This could present a possible security liability, as an unauthorized DNS server might pass along invalid resource records to misdirect DNS queries.
It can also cache negative responses resulting from not receiving an answer to the query, which can lead to sites appearing to unavailable when a second try can get through. It can also disable a DNS server altogether if it's too slow to respond, leaving you unable to access anything since most ISPs only provide two servers.
In theory, DNS caching should speed up access to web pages but it's probably unmeasurable. The only difference I've noticed since disabling the DNS Client service is fewer errors accessing servers.