Pondus
4
Sorry for my bad Spelling am from sweden.
Tjena grabben .... hur är läget i Vansjø
make sure that any leftover files from previous used AV (before avast) is removed http://www.avast.com/en-eu/faq.php?article=AVKB11#artTitle
then try a New clean install, run it for all Version you have had and reboot http://www.avast.com/sv-se/uninstall-utility
then install again http://www.avast.com/sv-se/download-software