There isn't enough clues yet. You can try telling how you connect to the internet and I could look at a Hijackthis log (use google.com!) but offer no support in removing the pests.
IEFIX might help (again with the use of google.com)
I am working on Windows PC XPs1. After a couple of hours the links dont work. I click on a link in a body of a message,a web page or my favorites and I get "cant find"
It was working perfectly a few days ago and restored my computer to the previous date when it was working good. The problem still exists.
I am connected to my service provider, but cannot find my home page, or my mail. When I click the print button, printer cannot be found.
After I shut down the computer for the night and boot up in the morning its working again. The problem comes on intermittenly during the the day. When I reboot, I still get the problem.
I use Ad-Aware, Sybot search and Destroy and Avg. No viruses were found.
What can I do to fix this?