In Need of Virus Help

I have been running AVG on my computer for several years and never had to
use it until now. After downloading some files I ran a scan and it detected
a problem and I'm not sure just what I should be doing to prevent a serious
infection here. The AVG program is informing me that I have several backdoor
Trojan Generic5 infections in my Documents and Settings and a Ms-Dos virus
in the System32\drivers and also a change in the shell32.dll file. I think
the program placed these things into a "Volt". Before I shut the computer
down is there something I should be doing with these files? When I try to
delete the files from the "Volt" I get a warning message, "Do you really
want to remove the file from the virus volt?" I'm not sure what to do here.
I ran the program a second time and it states there are no threats. What is
going to happen with the infected files? Should they be replaced?

Help,

Don DeWitt

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