Hi Ghost57, me again

Can I take it you downloaded CAVs and it didn't find the virus? Did you update the virus database before scanning?
Are you running any other AV programs, if so, which?
I found some info on removing Trojan-Downloader.Win32.Agent.bl:
1. Delete the original Trojan file (its location will depend on how the malicious program originally penetrated the victim machine).
2. Delete the file downloaded by the Trojan:
C:\ntldr.pif
From what I can make out, the other viruses found in your scan are just different names for the same virus.
Perform the steps above and run another scan.
Toggie