DavidR
3
You don’t say what avast version you are using avast 8 or the avast 2014 (9.0.2006), my info and image relates to avast 2014. But should also be available in the avast 8 boot-time scan settings.
You could try changing the boot-time settings, from Ask to No Action, this should allow the scan to continue without your input.
You should then be able to check the boot-time scan report later.