Frozed Internet Connection!!!, Mostly trojan problems

Hi everyone,

The computer I'm using, which has WinNT recently infected by the whole bunch of virus and I don't know what to do. The problem is now more comlicated since the virus seem to change something in the registry that I couldn't get internet connection (This is the BIGGEST problem that I want to solve first) and therefore much harder for me to search for helpful information. After scanning with Norton Antivirus, this is what I get:

Date: 12/23/2005, Time: 1:18:16,
The file
C:\WINNT\system32\encodex.exe
is infected with the Download.Trojan virus.
Unable to repair this file.


Date: 12/23/2005, Time: 1:18:16,
The file
C:\WINNT\system32\encodex.exe
is infected with the Download.Trojan virus.
Access to the file was denied.


Date: 12/23/2005, Time: 1:18:18,
The file
C:\WINNT\system32\howiper.exe
is infected with the Trojan Horse virus.
Unable to repair this file.


Date: 12/23/2005, Time: 1:18:18,
The file
C:\WINNT\system32\howiper.exe
is infected with the Trojan Horse virus.
Access to the file was denied.


Date: 12/23/2005, Time: 1:18:24,
The file
C:\WINNT\system32\favset.exe
is infected with the Trojan.Favadd virus.
Unable to repair this file.


Date: 12/23/2005, Time: 1:18:24,
The file
C:\WINNT\system32\favset.exe
is infected with the Trojan.Favadd virus.
Access to the file was denied.


Date: 12/23/2005, Time: 1:18:26,
The file
C:\WINNT\system32\idemlog.exe
is infected with the Trojan.Adclicker virus.
Unable to repair this file.


Date: 12/23/2005, Time: 1:18:26,
The file
C:\WINNT\system32\idemlog.exe
is infected with the Trojan.Adclicker virus.
Access to the file was denied.


Date: 12/23/2005, Time: 1:18:38,
The file
C:\WINNT\system32\dgprpsetup.exe
is infected with the Trojan.Stwoyle virus.
Unable to repair this file.


Date: 12/23/2005, Time: 1:18:38,
The file
C:\WINNT\system32\dgprpsetup.exe
is infected with the Trojan.Stwoyle virus.
Access to the file was denied.

Please, anyone outthere, give mesome advices. Thanks so much in advance