sono ancora io, ho installato virit e ho trovato che il file infetto era riconducibile mfie.exe.
Attraverso una guida sul sito di virit, forse sono riuscito ad eliminare questa voce. resta il problema dei programmi in avvio lenti e dove virit mi trova sempre un trojan resurrector nel registro in avvio.
Posso cancellare il servizio aggiunto dal virus e la chiave di registro appinet_dlls?
vi posto il log di ora!
Logfile of HijackThis v1.99.1
Scan saved at 14.19.55, on 25/08/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\LEXPPS.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Eset\nod32kui.exe
C:\WINDOWS\system32\LXSUPMON.EXE
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\Web Accelerator\slipcore.exe
C:\VEXPLITE\MONLITE.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Web Accelerator\slipgui.exe
C:\Programmi\ewido anti-spyware 4.0\guard.exe
C:\Programmi\Eset\nod32krn.exe
C:\PROGRA~1\Agnitum\OUTPOS~1.0\outpost.exe
C:\WINDOWS\system32\pctspk.exe
C:\WINDOWS\system32\svchost.exe
C:\VEXPLITE\viritsvc.exe
C:\WINDOWS\system32\wscntfy.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\Programmi\File comuni\Agnitum Shared\Aupdate\aupdrun.exe
C:\Hijackthis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.arianna.it/perie/hometestie.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.libero.it/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.iol.it
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [nod32kui] "C:\Programmi\Eset\nod32kui.exe" /WAITSERVICE
O4 - HKLM\..\Run: [LXSUPMON] C:\WINDOWS\system32\LXSUPMON.EXE RUN
O4 - HKLM\..\Run: [AdslTaskBar] rundll32.exe stmctrl.dll,TaskBar
O4 - HKLM\..\Run: [SlipStream] "C:\Programmi\Web Accelerator\slipcore.exe"
O4 - HKLM\..\Run: [VIRIT LITE MONITOR] C:\VEXPLITE\MONLITE.EXE
O4 - HKLM\..\Run: [Outpost Firewall] C:\PROGRA~1\Agnitum\OUTPOS~1.0\outpost.exe /waitservice
O4 - HKLM\..\Run: [OutpostFeedBack] C:\PROGRA~1\Agnitum\OUTPOS~1.0\feedback.exe /dump:os_startup
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: SlipStream Web Accelerator.lnk = C:\Programmi\Web Accelerator\slipgui.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Outpost Firewall Pro Quick Tune - {44627E97-789B-40d4-B5C2-58BD171129A1} - C:\PROGRA~1\Agnitum\OUTPOS~1.0\Plugins\BrowserBar\ie_bar.dll
O14 - IERESET.INF: START_PAGE_URL=http://www.iol.it
O16 - DPF: DownloadInformation -
O17 - HKLM\System\CCS\Services\Tcpip\..\{A9C94468-512E-4C39-8BC4-0D870D941ED0}: NameServer = 85.37.17.10 85.38.28.86
O20 - AppInit_DLLs: Prova.dll C:\PROGRA~1\Agnitum\OUTPOS~1.0\wl_hook.dll
O23 - Service: ewido anti-spyware 4.0 guard - Anti-Malware Development a.s. - C:\Programmi\ewido anti-spyware 4.0\guard.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: NOD32 Kernel Service (NOD32krn) - Unknown owner - C:\Programmi\Eset\nod32krn.exe
O23 - Service: Outpost Firewall Service (OutpostFirewall) - Agnitum - C:\PROGRA~1\Agnitum\OUTPOS~1.0\outpost.exe
O23 - Service: PCTEL Speaker Phone (Pctspk) - PCtel, Inc. - C:\WINDOWS\system32\pctspk.exe
O23 - Service: Virit eXplorer Lite (viritsvclite) - TG Soft Sas www.tgsoft.it - C:\VEXPLITE\viritsvc.exe

ciao dadomicoud,
se non posti i log necessari , non potremo aiutarti .... poi se vuoi fare altrimenti...sei libero di farlo.