The customer from: http://computer-aid.com.au/blog/2007/11/17/800ccc0f-error-while-dowloading-emails-in-outlook-express/ calls me to setup her PC after moving house (and to say that the repeat email problem has re-appeared)

After setting up the PC, modem, skype phone, printer, etc., its obvious that outlook express is only downloading a handful of messages, and then stops.

But this time, there’s an extra (obvious) clue: the CA internet security email scanner pops up to say it detected something in one of the emails… as soon as I say “quarantine”, the email download dies.

Interesting. I check to see what has been downloaded (in OE), and delete the equivalent emails via webmail. Then OE downloads another handful, then dies again.

I repeat the above process until all emails make it through. I was (again) hoping that OE would get stuck on just one email… but no.

After some investigation, I figure that stopping CA from scanning emails is the best way to fix this… looking at the CA software, I eventually find I need to disable email scanning in about 5 different places, before I’m sure its not going to look at any emails.

While I’m mucking around with CA, I decide to find out why the microsoft updates don’t work (it stays at 0%), the webmail behaves strangely, and IE is still on version 6.

I then find that the CA firewall is blocking the MS updates and is causing my original problem of webmail working intermittently.

So: disable the CA firewall… enable the XP firewall, and everything seems to finally be working correctly.

Customer also agrees to move away from CA once the licence period is over.