Windows 10 issues with Avast

Viruses and worms
1

Just upgraded to Windows 10 and the avast Firewall NDIS Filter Miniport device driver cannot load as it states the driver may be corrupted or missing (Code 39)
Can anyone help please

2

Repair Avast:

  1. Control Panel → Add/Remove programs → Avast
  2. Click on ‘Repair’.
  3. Follow instructions.
  4. Reboot.