Replace all copies of IE with a skinned, renamed version of Firefox that calls itself IE 9.
Now that you mention it, I can't think of anything better for humanity.
You have a very limited imagination.
I don't think that Conficker is going to be making an impact on world hunger very soon.
How difficult would it be to write a virus that fixed common system vulnerabilities? Could one write something that would run Windows Update, download Spybot and some other free antivirus programs to do a sweep, update Java and Flash, etc.?
Although I have no sources I was under the impression that the more sophisticated viruses already did this. Not for altruistic reasons but because they want exclusive control of the resources available.
I imagine it's similar to the biochemical changes that occur in a newly fertilized egg to prevent entry of additional sperm.
I could be wrong though. As I say I haven't exactly researched this.