Without basic information such as the *operating system you are using, you will find that it will be more difficult to obtain help here - not everyone is conversant with every Windows version with regard to malware removal, so they will be unlikely to offer help until they are sure that they can do so (Personally I only work XP logs).
I suggest that you read and work through steps 6, 7 and 8 here
and then start a new
thread and post a brief description of your problem, the DDS, Attach and GMER logs from the above link and the MBAM log that details any detections and somebody will be along as soon as.
Please stop AVG from touching either explorer.exe or winlogon.exe if it prompts you for permission to do anything. These are possibly infected system files and incorrectly handling them could do terrible things to your operating system.
* The DDS log will include your operating system, so you don't need to state it.