I found it very slow this morning but had just downloaded Adobe so thought that it was probably the problem and uninstalled it again. It seemed to work ok after a reboot so not sure if that was my problem or not.
Is it just PCA or are you having problems with other sites. Have you tried Command prompt and typed if ipconfig /flushdns it will tell you dns has been flushed if so you need to reboot for it to take affect.
I use IE7pro add-on and find that it helps you browse a lot quicker worth a try if you are having problems.if you use it make sure Ad-blocker is ticked and Mini download manager is unticked.