After 8 hours of ATT on site work it was determined that something in or about my pc slows down our internet connection. With my network card unplugged my admin will get about 2.5 mbps download. Plug in my network connection and she drops to .4 or .5. When i am plugged in i get in the .4 or .5 speed. We have an att modem then a Linksys router. We swapped out routers and modem and no difference. It is my pc. It is a fairly new PC. I have AVG anti spyware. When i first got the pc i installed Zone ALarm. It was not a good match. Totally screwed up several things in connecting to internet. I have long ago uninstalled it using both uninstall and Zone Alarm program to remove all trace of program. When i hook up a lap top to my network connection the down load speed are good. I am using Vista home. I have disabled AVG and it makes no difference.