The message means just what it says..."driver not loaded." and is not uncommonly when attempting to run aswMBR. Many ARK tools utilize a special driver and sometimes it does not load properly.
aswMBR is an advanced stand-alone tool that will help investigate for the presence of rootkit activity
that infect the MBR/VBR/SRV...this includes the TDL4/3(Alureon), ZAccess, MBRoot (Sinowal), Whistler, SST, Cidox, Pihar rootkits and others. An active Internet connection is required to download the the avast virus definitions and for the tool to run properly.
Some ARK tools like aswMBR are intended for advanced users
or to be used under the guidance
of an expert who can interpret the log results and investigate it for malicious entries before taking any removal action.
I am a firm believer that if someone is unsure how to use a particular security tool or interpret any logs it generates, then they probably should not
be using it. Folks often panic when they see scanning log results they do not understand after using tools they no very little about. Some security tools are intended for advanced users
, those who are knowledgeable of the Windows registry or to be used under the guidance of an expert
who can interpret the log results and investigate it for malicious entries before taking any removal action. Security tools will show everything they find that is a possible problem (good and bad) but you need to know what to remove and what not to remove
. Incorrectly removing legitimate entries could lead to disastrous problems
with your operating system.
You have already posted for assistance here
and should wait for one of the BC 1st Responders to help you.