If you have experienced problems accessing a web page it could be because your web browser has cached (stored) a 'bad' version of that page. Deleting your temporary internet files can help.
How to delete Temporary Internet files in Internet Explorer
How to delete Temporary Internet files in Firefox
If you trust the contents of a website as safe you can add it to your list of trusted sites.
Adding the OU Domain to the list of Trusted Sites in Internet Explorer
Some OU course software has been designed to run within a web browser. The software may be running a scripting program for the interactive elements of the software or use plug-in applications, such as Adobe Flash to display multimedia such as audio or video clips. For these to run properly you may need to enable active content in your web browser.
