First don't panic. Google them and see if AVG is giving false positives. If only one programs finds them they could be false positives. It is very unusual for MSE and MAM to miss such things both at the same time.
Use this program free from Microsoft.
Microsoft Safety Scanner - Antivirus | Remove Spyware, Malware, Viruses Free
Once again stay calm. Does you computer act up in strange ways? How are things working? Can you update your security programs? Can you update Windows? It is late so are experts on such things, so it might be a while for them to help you. While waiting do your Google, Run that Microsoft scan and then post the results and answer those questions.
REASONS: Most trojans won't let you update security programs or access the internet. Many won't let you run security scans in the normal fashion. All these little pieces of information help others help you.
Once stay calm you will win.