Virus détecté par antivir est ce grave?

Bonjour,

En réalisant un scan ce matin, mon antivirus a détecté un virus.

Je vous laisse le rapport ci-dessous. Ma question est :

- Comment je fais maintenant? et est-ce grave?

Merci beaucoup d'avance!

Avira AntiVir Personal
Report file date: vendredi 22 août 2008 12:07

Scanning for 1566590 virus strains and unwanted programs.

Licensed to: Avira AntiVir PersonalEdition Classic
Serial number: 0000149996-ADJIE-0001
Platform: Windows XP
Windows version: (Service Pack 2) [5.1.2600]
Boot mode: Normally booted
Username: SYSTEM
Computer name: FAMILLE

Version information:
BUILD.DAT : 8.1.0.331 16934 Bytes 12/08/2008 11:46:00
AVSCAN.EXE : 8.1.4.7 315649 Bytes 26/06/2008 08:57:53
AVSCAN.DLL : 8.1.4.0 40705 Bytes 26/05/2008 07:56:40
LUKE.DLL : 8.1.4.5 164097 Bytes 12/06/2008 12:44:19
LUKERES.DLL : 8.1.4.0 12033 Bytes 26/05/2008 07:58:52
ANTIVIR0.VDF : 6.40.0.0 11030528 Bytes 18/07/2007 10:33:34
ANTIVIR1.VDF : 7.0.5.1 8182784 Bytes 24/06/2008 13:54:15
ANTIVIR2.VDF : 7.0.6.10 2587136 Bytes 14/08/2008 14:42:00
ANTIVIR3.VDF : 7.0.6.51 217600 Bytes 21/08/2008 16:50:42
Engineversion : 8.1.1.23
AEVDF.DLL : 8.1.0.5 102772 Bytes 09/07/2008 08:46:50
AESCRIPT.DLL : 8.1.0.68 315770 Bytes 19/08/2008 11:01:07
AESCN.DLL : 8.1.0.23 119156 Bytes 28/07/2008 12:03:01
AERDL.DLL : 8.1.0.20 418165 Bytes 09/07/2008 08:46:50
AEPACK.DLL : 8.1.2.1 364917 Bytes 28/07/2008 12:03:00
AEOFFICE.DLL : 8.1.0.22 192890 Bytes 19/08/2008 11:01:05
AEHEUR.DLL : 8.1.0.50 1388918 Bytes 19/08/2008 11:01:03
AEHELP.DLL : 8.1.0.15 115063 Bytes 09/07/2008 08:46:50
AEGEN.DLL : 8.1.0.36 315764 Bytes 19/08/2008 11:00:54
AEEMU.DLL : 8.1.0.7 430452 Bytes 01/08/2008 14:09:13
AECORE.DLL : 8.1.1.8 172406 Bytes 01/08/2008 14:09:10
AEBB.DLL : 8.1.0.1 53617 Bytes 24/04/2008 08:50:42
AVWINLL.DLL : 1.0.0.12 15105 Bytes 09/07/2008 08:40:05
AVPREF.DLL : 8.0.2.0 38657 Bytes 16/05/2008 09:28:01
AVREP.DLL : 8.0.0.2 98344 Bytes 01/08/2008 14:09:09
AVREG.DLL : 8.0.0.1 33537 Bytes 09/05/2008 11:26:40
AVARKT.DLL : 1.0.0.23 307457 Bytes 12/02/2008 08:29:23
AVEVTLOG.DLL : 8.0.0.16 119041 Bytes 12/06/2008 12:27:49
SQLITE3.DLL : 3.3.17.1 339968 Bytes 22/01/2008 17:28:02
SMTPLIB.DLL : 1.2.0.23 28929 Bytes 12/06/2008 12:49:40
NETNT.DLL : 8.0.0.1 7937 Bytes 25/01/2008 12:05:10
RCIMAGE.DLL : 8.0.0.51 2371841 Bytes 12/06/2008 13:48:07
RCTEXT.DLL : 8.0.52.0 86273 Bytes 27/06/2008 13:34:37

Configuration settings for the scan:
Jobname..........................: Complete system scan
Configuration file...............: c:\program files\avira\antivir personaledition classic\sysscan.avp
Logging..........................: low
Primary action...................: interactive
Secondary action.................: ignore
Scan master boot sector..........: on
Scan boot sector.................: on
Boot sectors.....................: C:, E:, G:,
Process scan.....................: on
Scan registry....................: on
Search for rootkits..............: off
Scan all files...................: Intelligent file selection
Scan archives....................: on
Recursion depth..................: 20
Smart extensions.................: on
Macro heuristic..................: on
File heuristic...................: medium

Start of the scan: vendredi 22 août 2008 12:07

The scan of running processes will be started
Scan process 'avscan.exe' - '1' Module(s) have been scanned
Scan process 'avcenter.exe' - '1' Module(s) have been scanned
Scan process 'WINWORD.EXE' - '1' Module(s) have been scanned
Scan process 'wmplayer.exe' - '1' Module(s) have been scanned
Scan process 'firefox.exe' - '1' Module(s) have been scanned
Scan process 'WISPTIS.EXE' - '1' Module(s) have been scanned
Scan process 'usnsvc.exe' - '1' Module(s) have been scanned
Scan process 'msnmsgr.exe' - '1' Module(s) have been scanned
Scan process 'alg.exe' - '1' Module(s) have been scanned
Scan process 'CCC.exe' - '1' Module(s) have been scanned
Scan process 'MOM.exe' - '1' Module(s) have been scanned
Scan process 'TeaTimer.exe' - '1' Module(s) have been scanned
Scan process 'ctfmon.exe' - '1' Module(s) have been scanned
Scan process 'avgnt.exe' - '1' Module(s) have been scanned
Scan process 'fssui.exe' - '1' Module(s) have been scanned
Scan process 'pptd40nt.exe' - '1' Module(s) have been scanned
Scan process 'RTHDCPL.exe' - '1' Module(s) have been scanned
Scan process 'svchost.exe' - '1' Module(s) have been scanned
Scan process 'fsssvc.exe' - '1' Module(s) have been scanned
Scan process 'WLanCfgG.exe' - '1' Module(s) have been scanned
Scan process 'WLService.exe' - '1' Module(s) have been scanned
Scan process 'avguard.exe' - '1' Module(s) have been scanned
Scan process 'explorer.exe' - '1' Module(s) have been scanned
Scan process 'sched.exe' - '1' Module(s) have been scanned
Scan process 'spoolsv.exe' - '1' Module(s) have been scanned
Scan process 'svchost.exe' - '1' Module(s) have been scanned
Scan process 'ati2evxx.exe' - '1' Module(s) have been scanned
Scan process 'svchost.exe' - '1' Module(s) have been scanned
Scan process 'svchost.exe' - '1' Module(s) have been scanned
Scan process 'svchost.exe' - '1' Module(s) have been scanned
Scan process 'svchost.exe' - '1' Module(s) have been scanned
Scan process 'ati2evxx.exe' - '1' Module(s) have been scanned
Scan process 'lsass.exe' - '1' Module(s) have been scanned
Scan process 'services.exe' - '1' Module(s) have been scanned
Scan process 'winlogon.exe' - '1' Module(s) have been scanned
Scan process 'csrss.exe' - '1' Module(s) have been scanned
Scan process 'smss.exe' - '1' Module(s) have been scanned
37 processes with 37 modules were scanned

Starting master boot sector scan:
Master boot sector HD0
[INFO] No virus was found!
Master boot sector HD1
[INFO] No virus was found!
[WARNING] System error [21]: Le périphérique n'est pas prêt.
Master boot sector HD2
[INFO] No virus was found!

Start scanning boot sectors:
Boot sector 'C:\'
[INFO] No virus was found!
Boot sector 'E:\'
[INFO] No virus was found!
Boot sector 'G:\'
[INFO] No virus was found!

Starting to scan the registry.
The registry was scanned ( '45' files ).

Starting the file scan:

Begin scan in 'C:\'
C:\pagefile.sys
[WARNING] The file could not be opened!
C:\System Volume Information\_restore{5A65147E-4AF4-4BB2-8AEB-1C40EEF6D76B}\RP57\A0010965.exe
[DETECTION] Contains a recognition pattern of the (harmful) BDS/Small.fft back-door program
[NOTE] The file was deleted!
Begin scan in 'E:\' <MES DOCUMENTS>
Begin scan in 'G:\' <LUCIE DISK>

End of the scan: vendredi 22 août 2008 12:19
Used time: 12:17 Minute(s)

The scan has been done completely.

4204 Scanning directories
88960 Files were scanned
1 viruses and/or unwanted programs were found
0 Files were classified as suspicious:
1 files were deleted
0 files were repaired
0 files were moved to quarantine
0 files were renamed
1 Files cannot be scanned
88958 Files not concerned
598 Archives were scanned
2 Warnings
1 Notes