Need to delete viruses on computer

[leondela]

my avg antivirus/antispyware found these files in a routine scan:
c:\SDFix\apps\legacy.txt backdoor.hupigon
c:\SDFix\apps\svc.txt backdoor.hupigon
c:\SDFix-troubleshooter\apps\legacy.txt backdoor.hupigon
c:\SDFix-troubleshooter\apps\svc.txt backdoor.hupigon

i thought i was smart to put the first one in the virus vault but i don't know if i should have. please help. how do i get theses files off of my computer properly?

attached are the screenshots of the scan results

 

[leondela]

please help