Clearing your browser cache very often will help with login issues, especially with BannerWeb and Blackboard.
To clear your browser's cache on a Windows PC, open the browser and press Ctl-Shift-Del. You will be prompted with the means to clear the cache.
To clear your browser's cache on a Mac, use Command-Y.
If these do not work or you are on a mobile device or have an older browser, visit Refresh Your Cache for instructions specific to your device/software.