I'm working on a computer that client cannot log into the inbox on Outlook Web Access. When he does, he gets the error "Microsoft Internet Explorer, Unknown Error 415". He can access Calendar and Options, but can't access Inbox or Contacts. This problem started when a heavy spyware infection was cleaned.
I took the computer back to the shop and have the same problem connected through my network. I can log in to his Outlook Web Access using my computer. XP Home is the OS. I've re-registered DLLs, cleaned cookies and cache, checked system date, checked for viruses and spyware. Any suggestions are appreciated.