Vista - help wjth my drivers please

hello
i'm running vista home prem (64bit) with sp1 installed.
i did a clean install of vista then added the sp1 then
updated all my drivers.the thing is that my drivers seem
to be using mirosoft drivers or the dates are wrong.one is
Realtek hd audio dated (2008/3/18).the other is ATI Theater
Video Driver ( tv tunner) dated (Mar. 5, 2008).
when i look in the device manager it says ( driver provider) microsoft
(driver date) 6/21/2006 for the hd audio.for the tv tunner it reads
( driver provider) ATI Technologies (driver date) 11/6/2007.so the
provider for the tv tunner is right but the date is wrong. this is
also happening to some other drivers like my network and all the intel
motherboard drivers that i downloaded .most of them have microsoft
as the provider and dates of 2006. any help?
thanks mike