I forgot to come back on this one.I trod the hard way to its complete removal, seeking out every Avira/Antivir registry entry and deleting them.
DescriptionRegistry Crawler enables power users and developers to quickly find and configure Registry settings. A powerful search engine allows you to find Registry information based on search criteria. Results are displayed in a list allowing you to access any key found with a single click. Registry Crawler has built-in support for bookmarks: you can bookmark any key in the Registry and then access it directly from the system tray. This feature allows you to create a set of Registry keys that you frequently access, eliminating the need to manually open regedit. Registry Crawler is resizable, allowing you to easily view long keys. The user interface has been redesigned, and an Export-to-Text button was added.