Yellowbird, the patch was available about 2 weeks before an exploit was actually found for the problem. Microsoft was ready for this one, but many Windows-users were not. After the exploit was found, a bunch of hackers started to manually exploit it, and it made news headlines. People still didn't patch their systems. About 2 weeks after that, this virus came out, and was able to infect around 250,000 computers that were STILL unpatched after all these weeks of warnings...