salve, in un s.o xp home mi si è installato un dialer il quale si rigenera ad ogni accensione di computer, allego il log nella speranza di un vostro competente suggerimento, grazie anticipatamente:

Logfile of Trend Micro HijackThis v2.0.0 (BETA)
Scan saved at 3.45.19, on 22/11/2008
Platform: Windows XP SP3 (WinNT 5.01.2600)
Boot mode: Normal

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:\Programmi\Windows Defender\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Lavasoft\Ad-Aware\aawservice.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\Symantec\LiveUpdate\AluSchedulerSvc.exe
C:\Programmi\Microsoft LifeCam\MSCamS32.exe
C:\PROGRA~1\NORTON~2\NORTON~1\NPROTECT.EXE
C:\WINDOWS\System32\nvsvc32.exe
C:\PROGRA~1\NORTON~2\NORTON~1\SPEEDD~1\NOPDB.EXE
C:\Programmi\Spyware Terminator\sp_rsser.exe
C:\WINDOWS\System32\svchost.exe
C:\windows\system\hpsysdrv.exe
C:\Programmi\HP\Digital Imaging\Unload\hpqcmon.exe
C:\WINDOWS\System32\hphmon05.exe
C:\HP\KBD\KBD.EXE
C:\Programmi\Multimedia Card Reader\shwicon2k.exe
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\Java\jre1.6.0_07\bin\jusched.exe
C:\Programmi\eBay\eBay Toolbar2\eBayTBDaemon.exe
C:\WINDOWS\PixArt\PAC7311\Monitor.exe
C:\WINDOWS\vVX3000.exe
C:\Programmi\Spyware Terminator\SpywareTerminatorShield.exe
C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\TomTom HOME 2\HOMERunner.exe
C:\Programmi\DNA\btdna.exe
C:\Programmi\HP\Digital Imaging\bin\hpqtra08.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\PROGRA~1\FILECO~1\SYMANT~1\CCPD-LC\symlcsvc.exe
C:\WINDOWS\system32\notepad.exe
C:\Documents and Settings\Proprietario\Desktop\email\hijackthis\HiJackThis_v2.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.crawler.com/search/dispatcher.aspx?tp=aus&qkw=%s&tbid=60076
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.tuttogratis.it/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,SearchAssistant = http://www.crawler.com/search/ie.aspx?tb_id=60076
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,CustomizeSearch = http://dnl.crawler.com/support/sa_customize.aspx?TbId=60076
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://www.crawler.com/search/ie.aspx?tb_id=60076
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch = http://dnl.crawler.com/support/sa_customize.aspx?TbId=60076
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R3 - URLSearchHook: myBabylon Toolbar - {34EA1C70-42CC-42C5-AA29-EC58B95A343E} - C:\Programmi\myBabylon\tbmyB0.dll
R3 - URLSearchHook: free-downloads.net Toolbar - {ECDEE021-0D17-467F-A1FF-C7A115230949} - C:\Programmi\free-downloads.net\tbfree.dll
O2 - BHO: eBay Toolbar Helper - {22D8E815-4A5E-4DFB-845E-AAB64207F5BD} - C:\Programmi\eBay\eBay Toolbar2\eBayTB.dll
O2 - BHO: myBabylon Toolbar - {34ea1c70-42cc-42c5-aa29-ec58b95a343e} - C:\Programmi\myBabylon\tbmyB0.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: NCO 2.0 IE BHO - {602ADB0E-4AFF-4217-8AA1-95DAC4DFA408} - C:\Programmi\File comuni\Symantec Shared\coShared\Browser\2.5\coIEPlg.dll
O2 - BHO: Symantec Intrusion Prevention - {6D53EC84-6AAE-4787-AEEE-F4628F01010C} - C:\PROGRA~1\FILECO~1\SYMANT~1\IDS\IPSBHO.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.6.0_07\bin\ssv.dll
O2 - BHO: Guida per l'accesso a Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: TwcToolbarBhoApp Class - {AA1F9DDB-E605-4ba6-81D4-E427DEE012AD} - C:\WINDOWS\system32\TwcToolbarBho.dll
O2 - BHO: free-downloads.net Toolbar - {ecdee021-0d17-467f-a1ff-c7a115230949} - C:\Programmi\free-downloads.net\tbfree.dll
O3 - Toolbar: Vista HP - {B2847E28-5D7D-4DEB-8B67-05D28BCF79F5} - c:\Programmi\HP\Digital Imaging\bin\hpdtlk02.dll
O3 - Toolbar: eBay Toolbar - {92085AD4-F48A-450D-BD93-B28CC7DF67CE} - C:\Programmi\eBay\eBay Toolbar2\eBayTB.dll
O3 - Toolbar: The Weather Channel Toolbar - {2E5E800E-6AC0-411E-940A-369530A35E43} - C:\WINDOWS\system32\TwcToolbarIe7.dll
O3 - Toolbar: Show Norton Toolbar - {7FEBEFE3-6B19-4349-98D2-FFB09D4B49CA} - C:\Programmi\File comuni\Symantec Shared\coShared\Browser\2.5\CoIEPlg.dll
O3 - Toolbar: myBabylon Toolbar - {34ea1c70-42cc-42c5-aa29-ec58b95a343e} - C:\Programmi\myBabylon\tbmyB0.dll
O4 - HKLM\..\Run: [hpsysdrv] c:\windows\system\hpsysdrv.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [CamMonitor] c:\Programmi\HP\Digital Imaging\Unload\hpqcmon.exe
O4 - HKLM\..\Run: [HPHUPD05] C:\Programmi\Hewlett-Packard\{45B6180B-DCAB-4093-8EE8-6164457517F0}\hphupd05.exe
O4 - HKLM\..\Run: [HPHmon05] C:\WINDOWS\System32\hphmon05.exe
O4 - HKLM\..\Run: [KBD] C:\HP\KBD\KBD.EXE
O4 - HKLM\..\Run: [UpdateManager] "C:\Programmi\File comuni\Sonic\Update Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [Recguard] C:\WINDOWS\SMINST\RECGUARD.EXE
O4 - HKLM\..\Run: [nwiz] nwiz.exe /installquiet /keeploaded /nodetect
O4 - HKLM\..\Run: [PS2] C:\WINDOWS\system32\ps2.exe
O4 - HKLM\..\Run: [Sunkist2k] C:\Programmi\Multimedia Card Reader\shwicon2k.exe
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\Java\jre1.6.0_07\bin\jusched.exe"
O4 - HKLM\..\Run: [eBayToolbar] C:\Programmi\eBay\eBay Toolbar2\eBayTBDaemon.exe
O4 - HKLM\..\Run: [PAC7311_Monitor] C:\WINDOWS\PixArt\PAC7311\Monitor.exe
O4 - HKLM\..\Run: [LifeCam] "C:\Programmi\Microsoft LifeCam\LifeExp.exe"
O4 - HKLM\..\Run: [VX3000] C:\WINDOWS\vVX3000.exe
O4 - HKLM\..\Run: [ccApp] "C:\Programmi\File comuni\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [osCheck] "C:\Programmi\Norton Internet Security\osCheck.exe"
O4 - HKLM\..\Run: [SpywareTerminator] "C:\Programmi\Spyware Terminator\SpywareTerminatorShield.exe"
O4 - HKCU\..\Run: [NVIEW] rundll32.exe nview.dll,nViewLoadHook
O4 - HKCU\..\Run: [BackupNotify] c:\Programmi\HP\Digital Imaging\bin\backupnotify.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [TomTomHOME.exe] "C:\Programmi\TomTom HOME 2\HOMERunner.exe"
O4 - HKCU\..\Run: [BitTorrent DNA] "C:\Programmi\DNA\btdna.exe"
O4 - HKCU\..\RunOnce: [] C:\Programmi\Internet Explorer\iexplore.exe http://www.symantec.com/techsupp/servlet/ProductMessages?module=2007&error=0&language=it&product=SymNRT&version=2008.0.3.16&build=Symantec&a=00000082.0000001f.0000004b&b=00000082.00000025.00000083&c=00000082.00000049.000000b9
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SERVIZIO DI RETE')
O4 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Programmi\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Ricerca - res://C:\Programmi\eBay\eBay Toolbar2\eBayTb.dll/RCSearch.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_07\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_07\bin\ssv.dll
O9 - Extra button: Express Cleanup - {5E638779-1818-4754-A595-EF1C63B87A56} - C:\Programmi\Norton SystemWorks\Norton Cleanup\WCQuick.lnk
O9 - Extra 'Tools' menuitem: Express Cleanup - {5E638779-1818-4754-A595-EF1C63B87A56} - C:\Programmi\Norton SystemWorks\Norton Cleanup\WCQuick.lnk
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing)
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing)
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/SharedContent/vc/bin/AvSniff.cab
O16 - DPF: {44990200-3C9D-426D-81DF-AAB636FA4345} (Symantec SmartIssue) - http://www.symantec.com/techsupp/asa/ss/sa/sa_cabs/tgctlsi.cab
O16 - DPF: {44990301-3C9D-426D-81DF-AAB636FA4345} (Symantec Script Runner Class) - http://www.symantec.com/techsupp/asa/ss/sa/sa_cabs/tgctlsr.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://by104fd.bay104.hotmail.msn.com/resources/MsnPUpld.cab
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} - http://download.bitdefender.com/resources/scan8/oscan8.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1177931744062
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O16 - DPF: {6B75345B-AA36-438A-BBE6-4078B4C6984D} (HpProductDetection Class) - http://h20270.www2.hp.com/ediags/gmn2/install/HPProductDetection.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1220451026406
O16 - DPF: {6F15128C-E66A-490C-B848-5000B5ABEEAC} (HP Download Manager) - https://h20436.www2.hp.com/ediags/dex/secure/HPDEXAXO.cab
O16 - DPF: {BDBDE413-7B1C-4C68-A8FF-C5B2B4090876} (F-Secure Online Scanner 3.3) - http://support.f-secure.com/ols/fscax.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{43428DA0-E214-4BF9-A2EC-3466C3E4E538}: NameServer = 192.168.16.1
O22 - SharedTaskScheduler: Precaricatore Browseui - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\System32\browseui.dll
O22 - SharedTaskScheduler: Daemon di cache delle categorie di componenti - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\System32\browseui.dll
O23 - Service: Lavasoft Ad-Aware Service (aawservice) - Lavasoft - C:\Programmi\Lavasoft\Ad-Aware\aawservice.exe
O23 - Service: Automatic LiveUpdate Scheduler - Symantec Corporation - C:\Programmi\Symantec\LiveUpdate\AluSchedulerSvc.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
O23 - Service: Symantec Lic NetConnect service (CLTNetCnService) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
O23 - Service: COM Host (comHost) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\VAScanner\comHost.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\Programmi\Symantec\LiveUpdate\LuComServer_3_4.EXE
O23 - Service: LiveUpdate Notice - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
O23 - Service: Norton UnErase Protection (NProtectService) - Symantec Corporation - C:\PROGRA~1\NORTON~2\NORTON~1\NPROTECT.EXE
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: Speed Disk service - Symantec Corporation - C:\PROGRA~1\NORTON~2\NORTON~1\SPEEDD~1\NOPDB.EXE
O23 - Service: Spyware Terminator Realtime Shield Service (sp_rssrv) - Crawler.com - C:\Programmi\Spyware Terminator\sp_rsser.exe
O23 - Service: Symantec Core LC - Unknown owner - C:\PROGRA~1\FILECO~1\SYMANT~1\CCPD-LC\symlcsvc.exe
O23 - Service: Symantec RemoteAssist - Symantec, Inc. - C:\Programmi\File comuni\Symantec Shared\Support Controls\ssrc.exe
O23 - Service: Utilità di pianificazione di LiveUpdate automatico - Symantec Corporation - C:\Programmi\Symantec\LiveUpdate\ALUSchedulerSvc.exe

--
End of file - 12754 bytes

Ciao.
Chi ti ha detto che è un dialer? L'antivirus?
Puoi postare il percorso, o il nome di questo dialer?
Elimina questa voce di HJT:
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch = http://dnl.crawler.com/support/sa_customize.aspx?TbId=60076
Poi elimina TUTTE le 016
Se non se ne vanno, in modalità normale, prova in Provvisoria.
Dai una pulita (registro compreso)con CCleaner http://www.aiutaamici.com/software?ID=11223

Scusami la domanda -che ti parrà forse sciocca- ma... non t'è venuto in mente che l'avviso che t'appare riguardi NON "un dialer chiamato ingresso", ma un tentativo "d'ingresso dialer" (insomma, che l'avviso stia a significare che c'è un dialer che cerca di accedere al tuo HD per metterci su casetta).