Ciao,
ho già rimosso tutti i file infetti e alla fine ho fatto lo scan con HiJackThis.
Mi consigliate di rimuovere ancora qualcosa (qualcosina l'ho già tolta io)?
Vi faccio seguire il log.

Grazie!

Logfile of HijackThis v1.99.1
Scan saved at 19.53.47, on 22/10/2007
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2600.0000)

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:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmi\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\atiptaxx.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Programmi\Kodak\Kodak EasyShare software\bin\EasyShare.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\drivers\KodakCCS.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\WINDOWS\System32\msiexec.exe
C:\Program Files\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://gw.aliceadsl.it/minisearch
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://gw.aliceadsl.it/home
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer fornito da Alice
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: (no name) - {14DA0AD2-7F0F-9D20-96D2-C0D65C7CD794} - (no file)
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [AtiPTA] atiptaxx.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - Startup: Adobe Gamma.lnk = C:\Programmi\File comuni\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Adobe Gamma Loader.exe.lnk = C:\Programmi\File comuni\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Kodak software updater.lnk = C:\Programmi\Kodak\KODAK Software Updater\7288971\Program\Kodak Software Updater.exe
O4 - Global Startup: Logiciel Kodak EasyShare.lnk = C:\Programmi\Kodak\Kodak EasyShare software\bin\EasyShare.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office\OSA9.EXE
O9 - Extra button: ATI TV - {44226DFF-747E-4edc-B30C-78752E50CD0C} - C:\Programmi\ATI Multimedia\TV\EXPLBAR.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
O12 - Plugin for .spop: C:\Programmi\Internet Explorer\Plugins\NPDocBox.dll
O17 - HKLM\System\CCS\Services\Tcpip\..\{13FFC0CA-2731-4942-BF26-07E8A11E4167}: NameServer = 193.70.192.25 193.70.152.25
O17 - HKLM\System\CS1\Services\Tcpip\..\{13FFC0CA-2731-4942-BF26-07E8A11E4167}: NameServer = 193.70.192.25 193.70.152.25
O23 - Service: Adobe LM Service - Adobe Systems - C:\Programmi\File comuni\Adobe Systems Shared\Service\Adobelmsvc.exe
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: IMAPI CD-Burning COM Service (ImapiService) - Roxio Inc. - C:\WINDOWS\System32\ImapiRox.exe
O23 - Service: Kodak Camera Connection Software (KodakCCS) - Eastman Kodak Company - C:\WINDOWS\system32\drivers\KodakCCS.exe
O23 - Service: SysLjw - Unknown owner - C:\Programmi\File comuni\Services\epZ.exe