Configuring Office365 on difficult XP computer

This entry will have no value to anyone else.  It's a specific situation for my own notes.  On the computer named Vostro1500-INTE, the Outlook 2010 has consistent trouble with configuring the Office365 account.

I tried all these things.

• Create new mail profile
• Setting the login/email address to username@domain.onmicrosoft.com
• Set DNS servers to 8.8.8.8 instead of internal DNS
• Create and connect to VPN without split tunnel

In the end, I found that the fix was to 1) create a new Windows profile and 2) disable the crappy Trend Micro antivirus.  Of note, I recreated the profile at first wihtout disabling AV and I had trouble configuring email - so perhaps disabling the AV was necessary.