AVG - Anti Virus
AVG is a free anti-virus program we use to find any virus's that may be on your PC.
HJT - HijackThis
HijackThis is a program we use to gather information about what is running and starting up on your PC. These programmes are used by both lagitimate programmers and hijackers that infect your PC with spyware/malware.
From the logs, the security team will determine which are lagitimate and which is virus/spyware/malware from the log you provide, and will then provide you with instructions on how to remove.