Esegui 
Vi allego il log di hijackthis, ditemi per cortesia cosa devo fixare:
Logfile of HijackThis v1.99.1
Scan saved at 22.23.48, on 05/07/2007
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)
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:\Programmi\Ahead\InCD\InCDsrv.exe
C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Alwil Software\Avast4\ashServ.exe
C:\PROGRA~1\Alwil Software\Avast4\ashDisp.exe
C:\Programmi\Java\jre1.5.0_06\bin\jusched.exe
C:\Programmi\QuickTime\qttask.exe
C:\Programmi\Picasa2\PicasaMediaDetector.exe
C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe
C:\Programmi\Unlocker\UnlockerAssistant.exe
C:\windows\system32\winlogon.exe
C:\WINDOWS\System32\ctfmon.exe
C:\WINDOWS\System32\RUNDLL32.EXE
C:\Programmi\SUPERAntiSpyware\SUPERAntiSpyware.exe
C:\Programmi\MSN Messenger\MsnMsgr.Exe
C:\Programmi\EPSON\EPSON CardMonitor\EPSON CardMonitor1.0.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\ZoneLabs\vsmon.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Documents and Settings\Roberta Mavero\Desktop\HijackThis.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.alice.it/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,AutoConfigURL = http//:192.168.1.1
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Windows Live Toolbar Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\Windows Live Toolbar\msntb.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: Windows Live Toolbar - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\Windows Live Toolbar\msntb.dll
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\Alwil Software\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [PinnacleDriverCheck] C:\WINDOWS\System32\PSDrvCheck.exe -CheckReg
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [PSDrvCheck] "C:\Programmi\Pinnacle\Instant PhotoAlbum\programs\PSDrvCheck.exe" -CheckReg
O4 - HKLM\..\Run: [PCLEPCI] C:\PROGRA~1\PINNAC~1\PPE\PPE.EXE
O4 - HKLM\..\Run: [Picasa Media Detector] C:\Programmi\Picasa2\PicasaMediaDetector.exe
O4 - HKLM\..\Run: [Zone Labs Client] "C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [UnlockerAssistant] "C:\Programmi\Unlocker\UnlockerAssistant.exe"
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [YeppStudioAgent] C:\Programmi\Samsung\SamsungMediaStudio4.1\SamsungMediaStudioAgent.exe
O4 - HKLM\..\Run: [Stupid bone loud ace] C:\Documents and Settings\All Users.WINDOWS\Dati applicazioni\ELSEBOWSSTUPIDBONE\Bias Grid.exe
O4 - HKLM\..\Run: [qzalba.exe] C:\DOCUME~1\ROBERT~1\IMPOST~1\Temp\qzalba.exe
O4 - HKLM\..\Run: [monrdfxa] "c:\windows\system32\monrdfxa.exe"
O4 - HKLM\..\Run: [muukaa.exe] C:\DOCUME~1\ROBERT~1\IMPOST~1\Temp\muukaa.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NVMCTRAY.DLL,NvTaskbarInit
O4 - HKCU\..\Run: [SUPERAntiSpyware] C:\Programmi\SUPERAntiSpyware\SUPERAntiSpyware.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Programmi\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [ooze01] C:\DOCUME~1\ROBERT~1\DATIAP~1\SixthRuleFile\chinlogo.exe
O4 - HKCU\..\Run: [FASTTRACKPassepartout] C:\WINDOWS\Passepartout.exe -A
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Programmi\File comuni\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: EPSON CardMonitor.lnk = ?
O4 - Global Startup: EPSON Status Monitor 3 Environment Check 2.lnk = C:\WINDOWS\system32\spool\drivers\w32x86\3\E_SRCV02.EXE
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: &Windows Live Search - res://C:\Programmi\Windows Live Toolbar\msntb.dll/search.htm
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra button: (no name) - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - (no file)
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
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSN Messenger\msgrapp.8.1.0178.00.dll
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSN Messenger\msgrapp.8.1.0178.00.dll
O20 - Winlogon Notify: SASWinLogon - C:\Programmi\SUPERAntiSpyware\SASWINLO.dll
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Programmi\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Programmi\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: EPSON Printer Status Agent2 (EPSONStatusAgent2) - SEIKO EPSON CORPORATION - C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
O23 - Service: InCD Helper (InCDsrv) - Ahead Software AG - C:\Programmi\Ahead\InCD\InCDsrv.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: PACSPTISVR - Sony Corporation - C:\PROGRA~1\FILECO~1\Sony Shared\AVLib\Pacsptisvr.exe
O23 - Service: Sony SPTI Service (SPTISRV) - Sony Corporation - C:\PROGRA~1\FILECO~1\Sony Shared\AVLib\Sptisrv.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe
Il dialer maledetto dovrebbe essere "muukaa.exe", qualcuno lo conosce ???
Sicuramente comunque c'è dell'altro perché Avast mi chiude l'autorizzazione per altri programmi che cercano di collegarsi ad internet.
Vi ringrazio per la disponibilità che sempre dimostrate.
Siete i numeri uno.
Ciao
