Help me updating my Antivirus.

[system]

When I was trying to update my Avast! Antivirus this happened:

http://uploadimage.ro/images/23865201899737597091.png

Please help.

[Asyn]

Repair avast!:

1. Control Panel → Add/Remove programs → avast!
2. Click on ‘Repair’.
3. Follow instructions.
4. Reboot.