happens to me at work at lunch time- i think a bandwidth issue for me, but don't know about yours. Home is no problem. Have you checked out your security settings to make sure there's nothing blocking pages from loading normally?
When you say freeze what do you mean? Do you have to reboot or does it just take a long time for the site tocome up. I don't have any problems with this site or any for that matter. Some sites are just slow.
If you can see the hour glass when this happens and are unable to scroll you may not have enough RAM ( random access memory ). Does the computer actually lock up and require a restart?