Assuming you have windows XP,
1.Open internet explorer, go to tools, internet options, under general tab
hit the delete button and put a check mark in the delete offline files, hit
ok then go back to delete files and hit ok, delete cookies. Now hit the
setting button go to view files If there are no files in here you have been
successful.
2.Double click 'my computer' go to your local disk usually it is the C
drive, double click on it, then go to Documents and settings, double click
on it, go to your user account, double click on it, (go to tools and folder
options, and under view, scroll down to confirm, that show hidden files and
folders is checked. hit ok,) go to local settings double click on it, you
will see two folders,
1. Temp, open it and delete contents
2. Temporary Internet files open it and delete contents.
Trusting this will resolve your issue.