Grazie mille per la risposta innanzitutto!
Allora ho seguito alla lettera i tuoi consigli. Con i programmi che mi hai elencato tu nella guida non sono riuscito ad eliminarli.
A questo punto ho installato HiJackthis e gli ho fatto fare la scansione del registro di sistema alla ricerca di file sospetti.
Ti allego quello che mi è uscito fuori:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\System32\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\File comuni\Symantec Shared\ccSetMgr.exe
C:\Programmi\File comuni\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\File comuni\Microsoft Shared\VS7Debug\mdm.exe
C:\Programmi\Norton AntiVirus\navapsvc.exe
C:\Programmi\Norton AntiVirus\AdvTools\NPROTECT.EXE
C:\Programmi\Norton AntiVirus\SAVScan.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\GSICON.EXE
C:\WINDOWS\System32\dslagent.exe
C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Programmi\DSB\DSB.exe
C:\Programmi\File comuni\Symantec Shared\ccApp.exe
C:\WINDOWS\System32\twink64.exe
C:\Program Files\Windows SyncroAd\SyncroAd.exe
C:\WINDOWS\System32\qxgthb.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Progra~1\WinMX\WinMX.exe
C:\Documents and Settings\Andrea\Dati applicazioni\ntoo.exe
C:\PROGRA~1\INCRED~1\bin\IMApp.exe
C:\Programmi\WinZip\WZQKPICK.EXE
C:\TinMessenger\TinMessenger.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Programmi\Internet Explorer\iexplore.exe
C:\Programmi\Microsoft Office\OFFICE11\WINWORD.EXE
C:\Programmi\File comuni\Symantec Shared\NMain.exe
C:\PROGRA~1\NORTON~1\navw32.exe
C:\WINDOWS\regedit.exe
C:\Documents and Settings\Andrea\Impostazioni locali\Temp\HijackThis.exe
C:\WINDOWS\System32\lpt.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar =
file://C:\DOCUME~1\Andrea\IMPOST~1\Temp\sp.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page =
file://C:\DOCUME~1\Andrea\IMPOST~1\Temp\sp.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar =
file://C:\DOCUME~1\Andrea\IMPOST~1\Temp\sp.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page =
file://C:\DOCUME~1\Andrea\IMPOST~1\Temp\sp.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
file://C:\DOCUME~1\Andrea\IMPOST~1\Temp\sp.html
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
file://C:\DOCUME~1\Andrea\IMPOST~1\Temp\sp.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: (no name) - _{CFBFAE00-17A6-11D0-99CB-00C04FD64497} - (no file)
O2 - BHO: BHObj Class - {00000010-6F7D-442C-93E3-4A4827C2E4C8} - C:\WINDOWS\nem219.dll (file missing)
O2 - BHO: LocalNRDObj Class - {00320615-B6C2-40A6-8F99-F1C52D674FAD} - C:\WINDOWS\localNRD.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {7A8FD0FE-42C3-42E5-AEF3-012BA6CCFA2A} - C:\WINDOWS\System32\ifj.dll
O2 - BHO: BAHelper Class - {A3FDD654-A057-4971-9844-4ED8E67DBBB8} - C:\Programmi\SideFind\sfbho.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Programmi\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Programmi\Norton AntiVirus\NavShExt.dll
O4 - HKLM\..\Run: [GSICONEXE] GSICON.EXE
O4 - HKLM\..\Run: [DSLAGENTEXE] dslagent.exe USB
O4 - HKLM\..\Run: [IncredimailDownloader] C:\Documents and Settings\Andrea\Desktop\incredimail.exe
O4 - HKLM\..\Run: [svckernell] c:\windows\svckernell.com
O4 - HKLM\..\Run: [taskmanager] c:\windows\taskmgr.com
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [ATIPTA] C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [helpw] "helpw.exe"
O4 - HKLM\..\Run: [DSB] C:\Programmi\DSB\DSB.exe
O4 - HKLM\..\Run: [ccApp] "C:\Programmi\File comuni\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [Advanced Tools Check] C:\PROGRA~1\NORTON~1\AdvTools\ADVCHK.EXE
O4 - HKLM\..\Run: [ControlPanel] C:\WINDOWS\System32\twink64.exe internat.dll,LoadKeyboardProfile
O4 - HKLM\..\Run: [Windows SyncroAd] C:\Program Files\Windows SyncroAd\SyncroAd.exe
O4 - HKLM\..\Run: [dludikyrvvc] C:\WINDOWS\System32\qxgthb.exe
O4 - HKLM\..\Run: [Power Scan] C:\Programmi\Power Scan\powerscan.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [IncrediMail] C:\PROGRA~1\INCRED~1\bin\IncMail.exe /c
O4 - HKCU\..\Run: [WinMX] C:\Progra~1\WinMX\WinMX.exe -m
O4 - HKCU\..\Run: [Bcoe] C:\Documents and Settings\Andrea\Dati applicazioni\ntoo.exe
O4 - Startup: C6 Client.LNK = C:\TinMessenger\TinMessenger.exe
O4 - Global Startup: LG Sync Manager.lnk = ?
O4 - Global Startup: LG SyncManager.lnk = ?
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Programmi\WinZip\WZQKPICK.EXE
O8 - Extra context menu item: &Add animation to IncrediMail Style Box - C:\PROGRA~1\INCRED~1\bin\resources\WebMenuImg.htm
O8 - Extra context menu item: E&sporta in Microsoft Excel -
res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: SideFind - {10E42047-DEB9-4535-A118-B3F6EC39B807} - C:\Programmi\SideFind\sidefind.dll (file missing)
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\MSMSGS.EXE
O9 - Extra 'Tools' menuitem: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\MSMSGS.EXE
O15 - Trusted Zone: *.clickspring.net
O15 - Trusted Zone: *.mt-download.com
O15 - Trusted Zone: *.my-internet.info
O15 - Trusted Zone: *.searchmiracle.com
O15 - Trusted Zone: *.skoobidoo.com
O15 - Trusted Zone: *.windupdates.com
O15 - Trusted Zone:
http://www.yeak.net
O16 - DPF: {15AD4789-CDB4-47E1-A9DA-992EE8E6BAD6} -
http://public.windupdates.com/get_file. ... 0889783bc3
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) -
http://security.symantec.com/sscv6/Shar ... vSniff.cab
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) -
http://security.symantec.com/sscv6/Shar ... /cabsa.cab
O16 - DPF: {8276E2C6-1F6B-4C6D-8517-7CA89254C666} (Iris Available Tables Control) -
http://www.casinowebcam.com/welcome/LiveCasino.cab
O16 - DPF: {91433D86-9F27-402C-B5E3-DEBDD122C339} -
http://www.netvenda.com/sites/gampr-it/itp/games3.cab
O16 - DPF: {9EB320CE-BE1D-4304-A081-4B4665414BEF} (MediaTicketsInstaller Control) -
http://www.mt-download.com/MediaTicketsInstaller.cab
O16 - DPF: {F57D17AE-CE37-4BC8-B232-EA57747BE5E7} -
http://195.225.176.5/d/gbqnzdm/thhwrte/ ... ainter.exe
O17 - HKLM\System\CCS\Services\Tcpip\..\{7328E992-792A-4FBE-B67D-BB5E8562C5FB}: NameServer = 195.130.224.18 195.130.225.129
O18 - Filter: text/html - {7C6CEA4F-6389-4A52-9FB7-5B3894CF7DBD} - C:\WINDOWS\System32\ifj.dll
O18 - Filter: text/plain - {7C6CEA4F-6389-4A52-9FB7-5B3894CF7DBD} - C:\WINDOWS\System32\ifj.dll
Quali dovrei eliminare secondo voi?
Grazie mille ancora per l'aiuto
Saluti