Appreciate the direct "Ask Me".
Initially, I tried checking with Microsoft and I was informed that "The Knowledge Base (KB) Article You Requested Is Currently Not Available
" pertaining to your required KB959247. Sorry.
However, I checked further and was informed that the actual message is:
"The Windows Vista operating system is not fully up-to-date, and theKB929547 Vista Patch is not present. If you install AVG on your systemwithout the KB929547 Vista Patch, you might experience significantsystem slowdown and internet connectivity issues
Should this be the case, then what you probably need is KB929547
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.