K. We have to try another route here to find the cause of our issues. I've done some research on the dde server problem that you described and the results are random and very difficult to apply to your problem, in that they apply to several windows products.
Can I ask you, do you have IE7 installed? Are you running Outlook (either express or microsoft outlook)
I'm going to try a more general fix first with some trialware in the meantime as this will help your system regardless (30 days free - you may want to consider purchasing this after using it - but you'll find you can buy the license key legitimately on ebay for a decent price should you want to and you wont need a cd posted to you as you already have the software installed so it's a simple purchase - up to you after you've used it!)
Download and install tune up 2006 trial which you'll find here - http://www.tune-up.com/
Run Tune Up Disc Clean Up
Run Tune Up Registry Clean Up
Click Optimize and Improve to run Reg Defrag, which will take a few minutes and need a reboot. You should disable the antivirus programme to run this
Check the anti virus is running after the reboot
After the reboot, click optimize then system optimizer to optimize the computer, select computer with an internet connection from the drop down menu, this also requires a reboot
After the reboot, click optimize then system optimizer to accelerate downloads, select the speed just above your actual connection speed, this requires a reboot
After the reboot, click optimize then system optimizer to run system advisor. Follow advice given
This program is a very comprehensive system optimizer and is able to locate and repair many issues in your sytem registry.
******* CANNOT BE STRESSED ENOUGH - UNDER NORMAL CIRCUMSTANCES, REGISTRY REPAIR SOFTWARE/TOOLS SHOULD ONLY BE USED BY THOSE COMFORTABLE EDITING THEIR REGISTRY THROUGH THE REGEDIT HEIRARCHY. IN OTHER WORDS - DO NOT TOUCH YOUR REGISTRY EVEN WITH A FIX PROGRAM UNLESS YOU KNOW WHAT YOU ARE DOING ******
This particular program is trusted by this site. It DOES NOT fix unnecessary "fix" phantom issues and is NOT trying to illicit payment from you for these "fixes" - it will highlight issues and then repair them. You should follow the advise it gives.
I have this software on my own pc. It gives you full functionality even from the trial version.
Try the above. Please be patient with these fixes. We WILL get there. Sometimes these issues are harder to find than a needle in a haystack. We'll get there.
(always have my support)