It could be that you have too much protection and they are all fighting each other.
Does your computer require third pary software to access the internet, i.e. motherboard drivers-- These may have become corupted- try re-installing.
If you have a XP CD put the CD in the drive and from run enter sfc /scannow (note the space). this will restore the XP defaults on your computer, and this may cure the problem.
BDFREE.msi is part of the AVG program, and this may be causing the problem-- If you do not use AVG now you can delete it (at your own risk).
I also suggest you run a Reg Cleaner. I have always found regscrubXP to be reliable, however there are others freely available.