If you have Windows XP, or know someone who does and can't get online, here is how to fix blaster worm yourself.
1. Open Control Panel
2. Open Administrative tools
3. Open Services shortcut
4. Maximize Local services
5. Open Remote procedure (RPC)
6. Open recovery tab
7. Change first 3 boxes to (Take No Action)
8. Apply, OK
That should do it. I discovered this myself after getting knocked off internet 3 times. Get Microsoft fix.