Final answer:
The correct answer is Option E. Joe should verify Ann's browser settings and inquire about any new software notifications to identify potential issues causing login problems.
Step-by-step explanation:
The next steps Joe should take to resolve the issue of Ann being unable to log on to a vendor's website from her office involve both verification and troubleshooting. One approach is to verify Ann's laptop browser settings (Option B), which may include ensuring that the correct website addresses are used, cookies are enabled, and that there are no incorrect proxy settings hindering the access. Reinstalling browsers or clearing cached files should be considered only after these initial checks.
Another critical step is to ask Ann about the notification and review the installed programs (Option E), which might indicate software conflicts or recently installed programs that could be causing the login issues. Testing login credentials and browser functionality without making significant changes, like reinstalling the browser or clearing cached files, could provide more immediate results without potentially disrupting other configurations.