|Common Problems on Internet Explorer|
Internet Explorer has an unstable cache that can cause various problems, such as being unable to login or getting logged out, unable to open screens or save changes, or errors like "Page cannot be displayed". According to Microsoft, "The first thing to do when Internet Explorer is misbehaving is empty your Internet Explorer cache."
Deleting Internet Explorer's cache fixes most reported problems:
Note: This affects all versions of Windows Internet Explorer, including 7.0. Firefox and Safari are more stable.