After scheduled AVG complete scans of my computer the following Trojan Horse viruses were found:
NOCTRLSP.Exe which was found in my C:\ hard drive in a program that I have been running for years. This is not a copy program but an original issued by Birdguides. This was referred to as a Trojan Horse DROPPER.HELIOSb.1.
A couple of days later 2 x Trojan Horse Generic9.AALK were found, one being on C:\ drive in the System Volume Information/restore and the other on c:\ drive Program Files\BTBroadband205 which is the BT modem, which I do not use as I now run a wireless router.
The 3 are in the Virus Vault, but I do not know what they are and what I should do with them.
My computer is running normally.

Please can you help

Considering the nature of the problem, I strongly recommend that you follow CastleCops' Malware Removal and Prevention procedure, a system CastleCops devised to enable users to either partially, or fully clean their systems without the direct aid of an expert.

Please read these instructions carefully. You will find the Malware Removal and Prevention Procedure here:

http://wiki.castlecops.com/Malware_Removal_and_Prevention:_Introduction

If that doesn't fix the problem, then go to this Forum, read the instructions at the top of the page carefully:

/f67-Hijackthis_Spyware_Viruses_Worms_Trojans_Oh_My.html

Follow these instructions:

/t102301-Hijackthis_Guidelines_Read_Before_Posting.html

and one of CC's trained 1st Responders or Security Experts will help you.

Note to everyone: You must be a CastleCops member to post for help in the HJT forum.