WMDC 6.1 - desktop computer could not access necessary network...

Apologies that this question is similar to a lot of others but I haven't
managed to find exactly the same issue on this forum. I've had no end of
trouble with WMDC as seems to be the general concenus among many users.

The old problem used to be the fairly common one where the error report
states:
"Activesync encountered a problem on the desktop: Support Code 85010014".
That was solveable by deleteting the existing partnerhip and setting up a new
one. The problem would hold off for a couple of days and then begin again.

What is happening not though is I get a message saying:
"Synchronization could not start because this desktop computer could not
access necessary network resources. Please restart your computer and try
again. If the problem persists, please contact your Administrator."

I have tried to following:

Deleting existing partnership
Uninstalling and then reinstalling WMDC 6.1
Hard reset of mobile device
Run diagnostics in Outlook

All searches have revealed problems like this using Activesync and/or
Outlook 2000 and the advice is it to repair Outlook and upgrade your version
of Activesync (on the PC).

I have just flashed a new ROM onto my handset and it synced. I attempted to
sync it again 15 minutes later (with no reboot of either the handset or the
PC) and I was back to the network error message. Rebooting the PC (as
suggested by the error message makes no difference).

Thinking about it the problem began (I think) when I installed Windows Live
Mesh. I don't think the two can be related though as Mesh isn't sharing
anything near my .pst files etc. All I am sharing is one folder in my 'My
Documents' folder.

Any suggestions from anyone who has had and fixed this problem?

Please?!

I'm running Vista Home Premium, Windows Mobile Device Center 6.1, HTC TyTn
running Windows Mobile 6.1.

 

I forgot to add that I'm running Outlook 2007 as well