??? Try using a different browser for starters. This sounds too weird to be a chess.com problem, even though they have plenty of them. Next see if anything in my blog helps
http://blog.chess.com/NimzoRoy/diagnosing-and-fixing-internet-problems
www.java.com/en/download/installed.jsp
Finally, contact the staff via Help & Support if you can't fix this and it persists.
I am having trouble navigating this site. The only way I can reach the forums is by clicking on one of my trophies. I have great trouble accessing my groups, and can't do it unless there is current group activity showing.