register?

when i try to register i get (the aavm subsystem detected a rpc error)and an x is in the avast icon. HELP?

Would you mind posting a screenshot? I am curious to know what you’re talking about exactly.

Try a repair…Control Panel>Uninstall a Program>double click “avast”>click “repair”>reboot

You failed to mention which version of avast (v7.0 v8.0 or v2014)?
Also any other security software?

For more see http://www.avast.com/faq.php?article=AVKB9#artTitle