Di seguito il log di hijackthis:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 16.35.22, on 16/05/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16791)
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:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\igfxtray.exe
C:\WINDOWS\system32\hkcmd.exe
C:\WINDOWS\system32\igfxpers.exe
C:\Programmi\Java\jre6\bin\jusched.exe
C:\Programmi\Hp\HP Software Update\HPWuSchd2.exe
C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
C:\Programmi\hpq\HP Wireless Assistant\HP Wireless Assistant.exe
C:\Programmi\HP\QuickPlay\QPService.exe
C:\Programmi\HPQ\Quick Launch Buttons\EabServr.exe
C:\Programmi\Eset\nod32kui.exe
C:\Programmi\SlySoft\CloneCD\CloneCDTray.exe
C:\Programmi\Winamp\winampa.exe
C:\Programmi\File comuni\Real\Update_OB\realsched.exe
C:\Programmi\Trust\Trust Keyboard 15036\PS2USBKbdDrv.exe
C:\Programmi\QuickTime\QTTask.exe
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\File comuni\Ahead\lib\NMBgMonitor.exe
C:\Programmi\Vidalia Bundle\Vidalia\vidalia.exe
C:\Documents and Settings\All Users\Dati applicazioni\Macrovision\FLEXnet Connect\6\ISUSPM.exe
C:\Programmi\Spybot - Search & Destroy\TeaTimer.exe
C:\Programmi\HP\Digital Imaging\bin\hpqtra08.exe
C:\Programmi\Vidalia Bundle\Privoxy\privoxy.exe
C:\Programmi\Digsby\lib\digsby-app.exe
C:\Programmi\HP\Digital Imaging\bin\hpqimzone.exe
C:\Programmi\Prevx\prevx.exe
C:\Programmi\Java\jre6\bin\jqs.exe
C:\Programmi\File comuni\LightScribe\LSSrvc.exe
C:\Programmi\Eset\nod32krn.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Viewpoint\Common\ViewpointService.exe
C:\WINDOWS\system32\fxssvc.exe
C:\Programmi\Hewlett-Packard\Shared\hpqwmiex.exe
C:\Programmi\Prevx\prevx.exe
C:\Programmi\HP\Digital Imaging\bin\hpqSTE08.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Programmi\Vidalia Bundle\Tor\tor.exe
C:\WINDOWS\System32\svchost.exe
C:\PROGRA~1\HPQ\SHARED\HPQTOA~1.EXE
C:\Programmi\uTorrent\uTorrent.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Programmi\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://192.168.1.254/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = 194.1.1.40:80
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Programmi\File comuni\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Program Files\Real\RealPlayer\rpbrowserrecordplugin.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\Programmi\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre6\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - C:\Programmi\Google\Google Toolbar\GoogleToolbar.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Programmi\Google\GoogleToolbarNotifier\5.1.1309.3572\swg.dll
O2 - BHO: Google Dictionary Compression sdch - {C84D72FE-E17D-4195-BB24-76C02E2E7C4E} - C:\Programmi\Google\Google Toolbar\Component\fastsearch_A8904FB862BD9564.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Programmi\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Programmi\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: Google Toolbar - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - C:\Programmi\Google\Google Toolbar\GoogleToolbar.dll
O4 - HKLM\..\Run: [igfxtray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [igfxhkcmd] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [igfxpers] C:\WINDOWS\system32\igfxpers.exe
O4 - HKLM\..\Run: [High Definition Audio Property Page Shortcut] CHDAudPropShortcut.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [HP Software Update] C:\Programmi\Hp\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [hpWirelessAssistant] C:\Programmi\hpq\HP Wireless Assistant\HP Wireless Assistant.exe
O4 - HKLM\..\Run: [QPService] "C:\Programmi\HP\QuickPlay\QPService.exe"
O4 - HKLM\..\Run: [eabconfg.cpl] C:\Programmi\HPQ\Quick Launch Buttons\EabServr.exe /Start
O4 - HKLM\..\Run: [Cpqset] C:\Programmi\HPQ\Default Settings\cpqset.exe
O4 - HKLM\..\Run: [RecGuard] C:\Windows\SMINST\RecGuard.exe
O4 - HKLM\..\Run: [nod32kui] "C:\Programmi\Eset\nod32kui.exe" /WAITSERVICE
O4 - HKLM\..\Run: [CloneCDTray] "C:\Programmi\SlySoft\CloneCD\CloneCDTray.exe" /s
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [WireLessKeyboard] C:\Programmi\Trust\Trust Keyboard 15036\StartAutorun.exe PS2USBKbdDrv.exe
O4 - HKLM\..\Run: [WinampAgent] C:\Programmi\Winamp\winampa.exe
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Programmi\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Programmi\File comuni\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
O4 - HKCU\..\Run: [swg] C:\Programmi\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programmi\File comuni\Ahead\lib\NMBgMonitor.exe"
O4 - HKCU\..\Run: [ChristmasTree] C:\DOCUME~1\Adry&Fra\IMPOST~1\Temp\Rar$EX00.531\Christmas.exe
O4 - HKCU\..\Run: [Vidalia] "C:\Programmi\Vidalia Bundle\Vidalia\vidalia.exe"
O4 - HKCU\..\Run: [ISUSPM] "C:\Documents and Settings\All Users\Dati applicazioni\Macrovision\FLEXnet Connect\6\ISUSPM.exe" -scheduler
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Programmi\Spybot - Search & Destroy\TeaTimer.exe
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 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Startup: digsby.lnk = C:\Programmi\Digsby\digsby.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Programmi\File comuni\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Avvio rapido HP Photosmart Premier.lnk = C:\Programmi\HP\Digital Imaging\bin\hpqthb08.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
O4 - Global Startup: Privoxy.lnk = C:\Programmi\Vidalia Bundle\Privoxy\privoxy.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~3\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\Programmi\Spybot - Search & Destroy\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search && Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\Programmi\Spybot - Search & Destroy\SDHelper.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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
O14 - IERESET.INF: START_PAGE_URL=http://www.hp.com
O16 - DPF: {02BF25D5-8C17-4B23-BC80-D3488ABDDC6B} (QuickTime Object) - http://a1540.g.akamai.net/7/1540/52/20061205/qtinstall.info.apple.com/qtactivex/qtplugin.cab
O18 - Filter: x-sdch - {B1759355-3EEC-4C1E-B0F1-B719FE26E377} - C:\Programmi\Google\Google Toolbar\Component\fastsearch_A8904FB862BD9564.dll
O23 - Service: Symantec Lic NetConnect service (CLTNetCnService) - Unknown owner - C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe (file missing)
O23 - Service: CSIScanner - Prevx - C:\Programmi\Prevx\prevx.exe
O23 - Service: getPlus(R) Helper - NOS Microsystems Ltd. - C:\Programmi\NOS\bin\getPlus_HelperSvc.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Programmi\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: hpqwmiex - Hewlett-Packard Development Company, L.P. - C:\Programmi\Hewlett-Packard\Shared\hpqwmiex.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Programmi\Java\jre6\bin\jqs.exe
O23 - Service: JTEIUPTQL - Sysinternals - www.sysinternals.com - C:\DOCUME~1\Adry&Fra\IMPOST~1\Temp\JTEIUPTQL.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Programmi\File comuni\LightScribe\LSSrvc.exe
O23 - Service: NOD32 Kernel Service (NOD32krn) - Eset - C:\Programmi\Eset\nod32krn.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: Viewpoint Manager Service - Viewpoint Corporation - C:\Programmi\Viewpoint\Common\ViewpointService.exe

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End of file - 11002 bytes

Scusami se sembro sprovveduto (un po' lo sono), mi spieghi cosa significa "fixare". E poi, se ho capito bene dovrei fare una scansione del file *.exe in questione con malwarebytes. Dove posso scaricare il programma?

http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html
da qui scarica malware,hai 2 opzioni tu effettua la scansione completa (quando si apre il programma)
fixare stà per eliminare ma devi usare il programma hijackthis.

Aggiungo che non riesco a raggiungere il sito consigliato da R16
http://downloads5.kaspersky-labs.com/devbuilds/AVPTool/

Non so che fare...

Ciao cronacafestiva .
Allora, da quello che ho capito, non riesci a collegarti a nessun sito antivirus.
Brutta storia. (Conficker?)
Prova eseguire queste scansioni on-line:
http://www.bitdefender.co.uk/scan_uk/scan8/ie.html
http://housecall.trendmicro.com/it/
http://www.eset.com/threat-center/cac.php
Dai una pulita (registro compreso)con CCleaner http://www.aiutaamici.com/software?ID=11223
Poi riprova con Kaspersky.

Devi chiudere alcune porte del pc:
Scarica Windows Worms Doors Cleaner
Tool no install (standalone) per chiudere le seguenti porte/servizi in XP/2K
http://static.commentcamarche.net/en.kioskea.net/download/files/wwdc.exe
Avvia WWDC, e se compaiono delle voci rosse, cliccaci sopra su tutte per correggerle e poi riavvia il PC. (è molto importante)
Avvia nuovamente WWDC e le voci dovrebbero essere tutte verdi.
Fai la scansione con Kaspersky.
Elimina quello che trova Malwarebytes.

Credo che ti stia dicendo che lui considera il servizio svchost.exe è infetto perchè secondo lui occupa troppa memoria, ma non vorrei dire una cavolata, aspetta gli esperti.

Non ho utilizzato Prevx semplicemente perché non ho la licenza e il programma non mi permette, senza di questa, di debellare il virus.
Comunque continuo a essere in alto mare. Ho fatto tutte le scansioni e ripuliture possibili con i programmi consigliati ma continuo a non poter accedere ad alcun sito di antivirus. Come posso risolvere?

Ok, entro in modalità provvisoria e riprovo... ma a fare cosa? Quale antivirus mi conviene utilizzare? Quali mosse devo fare?