bootscan: error 3221225506

Hi,

I just re-installed Avast! Home Edition. Now I scheduled a bootscan and it comes up with a few errors (see subject). No other information is given. What does this error mean?

Have a look HERE and follow the links technical posted. Are they of any help to you?

error 3221225506 - is Access Denied. Try modifying security properties of the file to allow full control to everyone and then running the boot time scan again.