Hi. I uninstalled Avast long ago, however Security Centre seems to think I still have it installed. I have tried to delete every instance of 'Avast' from the registry, but it still appears. I think I found the key to delete 'LEGACY_AVAST_ANTIVIRUS' but it doesn't let me delete this particular key or edit it. It's not that much of an issue, as it doesn't appear if MSE is up to date, but I don't know why Avast is still viewed by the security centre.