Having been running Outlook 2003 on XP(home V5.1.2600 SP2) for sometime with no problems. PC connected direct to linksys router and then through highspeed modem (Rogers in Canada). Mail provider is Yahoo. Running Norton Internet Security software. I have made no changes to the Outlook settings that have worked for years
Few weeks ago, began getting repeated requests to enter username/password when fetching emails. System refused to remember despite checking box. Went to microsoft site and downloaded updates, so system should be current. Norton s/w uses Live Update and this too is current. Couple days ago, unable to send emails (error 0x800ccc0f). Can receive emails ok though. Funny enough, it's stopped asking the username/password but this makes sense if it was triggered by email upload process rather than download.
After reading endless tech-support advice, including scouring Microsoft, still cannot resolve. When diasabling Norton s/w, error message changes to 0x80042109 so maybe this is a hint??
I suspect that one or more of the updates has changed a setting someplace but I'm at a loss to find it.