Need Help!!!

Hey folks. I am using windows vista xp on my new HP Pavillion computer and I
am experiencing a major problem with vista. My internet connection will
often stop working every 30-45 minutes. I am using a wireless connection and
I thought that maybe that was a problem so i connected to my cable modem with
a wired connection however this did not resolve my issue. I have tried
updating all my drivers however it always says that my drivers are all 100%
up to date. I have gone through power options and turned my power setting to
high performance and turned off the option of allowing my network card go to
sleep mode, again all to no avail. I tried using the microsoft update but
nothing has resolved this issue. Does anyone know how to fix this? I am
getting really frusterated.