What browser are you using?
Try some system maintenance.
Select Start, All Programs, Accessories, System Tools, Disk CleanUp to empty your Recycle Bin, remove Temporary Internet Files and other
selected options. I also recommend you click on the More Options tab, System Restore and remove all but the latest System Restore point. Run Disk Defragmenter.
Using the System restore option is most appropriate when your system is running slow and you need to increase free disk space on your C
partition. If you have errors which might be resolved using System Restore to put your system settings back to before the error first occurred do not use this option.
If more than one person uses the computer and they have their own user Log on you need to run Disk CleanUp in each user profile to remove
all unwanted files.
A better programme than Disk CleanUp is cCleaner. Removing System Restore points can be important if you have limited free disk space.
The ability to remove them is one of the Tools options. cCleaner comes with a Registry tool. Do not use this tool as like any registry cleaner it can lead to the creation of very difficult to resolve system errors.
http://www.ccleaner.com/download