Ok, first, go to Start < Run < ipconfig /flushdns
if this didn't help, then download the newest Java version from:
http://java.sun.com/javase/downloads/index.jsp
If this didn't help, Open Internet Explorer Go To Tools < Internet Options < Connections < Lan Settings and make sure that your settings are like these:
If this didn't help - You'll need to download SpyBot S&D and start a scan.
You'll have Spyware Probs.
If none of these helped - Post here.