Bon ben je suis désolé, mais je viens de faire ce que tu m'as dit, j'ai bien supprimé les fichiers infectés, mais après avoir utilisé Antivir, je retouve mes 6 alertes du départ :

C:\WINDOWS\system32
tmp~2.exe
ArchiveType: RAR SFX (self extracting)
--> stt.exe
[DETECTION] Is the Trojan horse TR/Virtl.Maxxx.A
--> unpack7.exe
[DETECTION] Is the Trojan horse TR/Drop.ExeBu.285.B
ArchiveType: RAR SFX (self extracting)
--> lssas.exe
[DETECTION] Contains signature of the dropper DR/ioFtpd.B
--> service.exe
The file contains signature of the PMS/Hcktl.Exe.285.2 program and was suppressed by the user.
--> stt.exe
[DETECTION] Is the Trojan horse TR/Virtl.Maxxx.A
--> csrs.exe
[DETECTION] Contains signature of the worm Worm/IRCBot.620544
--> srvchk.exe
[DETECTION] Is the Trojan horse TR/Virtl.HiddenRun.B

HEEEEEEEEEELPPPPP!!!!!! Merci