I'm not sure what else you could try to fix the codec problem, short of a clean re-install of Windows. Codecs.com lists a couple other programs (similar to Direct Show Filter manager and Codec Tweak Tool) that you could try, which might help where the others did not:
Cucusoft Codec Fixer,
Win7DSFilterTweaker,
Codec Toolbox RS,
BigFix.
If you can not fix the problem, at least it can be avoided.
A belated welcome to the forum.
