You could enable a boot time scan. Right click the avast icon, select Start avast! Antivirus, Menu, ‘Schedule boot-time scan…’

Or see http://www.digitalred.com/avast-boot-time.php

If anything is found send it to the chest/quarantine, don’t delete.

If you haven’t already got this software (freeware), download, install, update and run it, preferably in safe mode.

  1. SUPERantispyware On-Demand only in free version. Or AVG anti-spyware (formerly Ewido) Resident scanner during trial On-Demand after trial ends. Or Spyware Terminator Resident scanner.