Ciao ALFONSO, grazie per la risposta, penso ancora di ritrovarmi il WORM W32.MediaKill.A@mm nel mio PC. Ho fatto come mi hai suggerito, (disattivato rep. conf, poi sono entrato in modo provv, ho svuotato la cartella temp, ho uasato sia AD.AWARE,SPYBOT,NORTON AV tutti aggiornati e non hanno rilevato nulla, ma quando controllo il regedit, il worm e´ancora presente.Il problema maggiore che la posta e´diventata lentissima da aprire, e spesso degli e-mail che invio tornano alla mia posta.Grazie per l´aiuto

Logfile of HijackThis v1.99.1
Scan saved at 16:10:48, on 15/11/2005
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:\Arquivos de programas\Ahead\InCD\InCDsrv.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccSetMgr.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\SNDSrvc.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\SPBBC\SPBBCSvc.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Arquivos de programas\Norton AntiVirus\navapsvc.exe
C:\Arquivos de programas\Norton AntiVirus\IWP\NPFMntor.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\pctspk.exe
C:\WINDOWS\System32\svchost.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\WINDOWS\Explorer.EXE
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccApp.exe
C:\Arquivos de programas\Internet Explorer\iexplore.exe
C:\Arquivos de programas\WinRAR\WinRAR.exe
C:\DOCUME~1\ELAINE\CONFIG~1\Temp\Rar$EX00.199\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com.br/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com.br
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Arquivos de programas\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\ARQUIV~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\arquivos de programas\google\googletoolbar1.dll
O2 - BHO: CNavExtBho Class - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Arquivos de programas\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Arquivos de programas\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\arquivos de programas\google\googletoolbar1.dll
O4 - HKLM\..\Run: [ccApp] "C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\ARQUIV~1\SYMNET~1\SNDMon.exe /Consumer
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: &Cerca con Google - res://C:\Arquivos de programas\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: &Traduci parola in italiano - res://C:\Arquivos de programas\Google\GoogleToolbar1.dll/cmwordtrans.html
O8 - Extra context menu item: Link a ritroso - res://C:\Arquivos de programas\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Pagine simili - res://C:\Arquivos de programas\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Versione cache della pagina - res://C:\Arquivos de programas\Google\GoogleToolbar1.dll/cmcache.html
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab31267.cab
O16 - DPF: {04E214E5-63AF-4236-83C6-A7ADCBF9BD02} (HouseCall Control) - http://housecall60.trendmicro.com/housecall/xscan60.cab
O16 - DPF: {0E5F0222-96B9-11D3-8997-00104BD12D94} (PCPitstop Utility) - http://www.pcpitstop.com/pcpitstop/PCPitStop.CAB
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - http://www.kaspersky.com/downloads/kws/kavwebscan_unicode.cab
O16 - DPF: {14B87622-7E19-4EA8-93B3-97215F77A6BC} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab31267.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/SharedContent/vc/bin/AvSniff.cab
O16 - DPF: {2FC9A21E-2069-4E47-8235-36318989DB13} (PPSDKActiveXScanner.MainScreen) - http://ppupdates.ca.com/downloads/scanner/axscanner.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://spaces.msn.com//PhotoUpload/MsnPUpld.cab
O16 - DPF: {54B52E52-8000-4413-BD67-FC7FE24B59F2} (EARTPatchX Class) - http://files.ea.com/downloads/rtpatch/v2/EARTPX.cab
O16 - DPF: {56393399-041A-4650-94C7-13DFCB1F4665} (PSFormX Control) - http://www.pestpatrol.com/pestscan/pestscan.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1121203228660
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - http://a840.g.akamai.net/7/840/537/2004061001/housecall.trendmicro.com/housecall/xscan53.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsClient.cab28578.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst.cab
O16 - DPF: {B8BE5E93-A60C-4D26-A2DC-220313175592} (ZoneIntro Class) - http://messenger.zone.msn.com/binary/ZIntro.cab32846.cab
O16 - DPF: {B942A249-D1E7-4C11-98AE-FCB76B08747F} (RealArcadeRdxIE Class) - http://games-dl.real.com/gameconsole/Bundler/CAB/RealArcadeRdxIE.cab
O16 - DPF: {BB21F850-63F4-4EC9-BF9D-565BD30C9AE9} (ASquaredScanForm Element) - http://www.windowsecurity.com/trojanscan/axscan.cab
O16 - DPF: {C3DFA998-A486-11D4-AA25-00C04F72DAEB} (MSN Photo Upload Tool) - http://sc.groups.msn.com/controls/PhotoUC/MsnPUpld.cab
O16 - DPF: {F6BF0D00-0B2A-4A75-BF7B-F385591623AF} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab31267.cab
O20 - AppInit_DLLs: MsgPlusLoader.dll
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccSetMgr.exe
O23 - Service: InCD Helper (InCDsrv) - Nero AG - C:\Arquivos de programas\Ahead\InCD\InCDsrv.exe
O23 - Service: Serviço do Auto-Protect do Norton AntiVirus (navapsvc) - Symantec Corporation - C:\Arquivos de programas\Norton AntiVirus\navapsvc.exe
O23 - Service: Norton AntiVirus Firewall Monitor Service (NPFMntor) - Symantec Corporation - C:\Arquivos de programas\Norton AntiVirus\IWP\NPFMntor.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: PCTEL Speaker Phone (Pctspk) - PCtel, Inc. - C:\WINDOWS\system32\pctspk.exe
O23 - Service: SAVScan - Symantec Corporation - C:\Arquivos de programas\Norton AntiVirus\SAVScan.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\ARQUIV~1\ARQUIV~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\SNDSrvc.exe
O23 - Service: Symantec SPBBCSvc (SPBBCSvc) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\SPBBC\SPBBCSvc.exe
O23 - Service: Symantec Core LC - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\Security Center\SymWSC.exe

Grazie ALFONSO per l´aiuto, passei il norton on-line, e RegSeeker, IL norton non incontro nulla. La mia posta sia Yahoo che Tiscali, sta diventando sempre piu´difficile d´aprire. Penso proprio che dovro´formattare tutto. Ciao e grazie.