kyrene, I suggest an installation from scratch:
- Download the latest version of avast! Uninstall Utility and save it.
- Download the latest avast! version and save it.
- Uninstall avast from Control Panel (if possible). If, for any reason, you can’t run it, try booting in Safe Mode and doing it from there. Anyway, boot after that.
- Run the avast! Uninstall Utility saved on 1 in Safe Mode. Boot after you’ve run it. Repeat this for any major avast! version you have ever installed/upgraded in your computer.
- Install avast! using the setup saved on 2. Boot.
- Register your free copy or add the license key for Pro. Or even upgrade your key from old versions.
- Check and post the results. If, for any reason, you did not solve, try doing the step 3 in Safe Mode anyway.
And the license could be received as David posted.