Ho fatto e penso di poterti dare tregua.
Ti ringrazio e ti rinnovo gli auguri.
Cordiali saluti.

@giullare
Dipende dal tipo di infezione :-)

Ho appena acceso il PC e per il momento tutto e' OK.
Ringrazio tutti per l'aiuto.
Buona Pasqua a tutti e un grazie particolare a meme 1580
Salutoni

della serie "se li conosci li eviti"...
non sono a conoscenza(ma cio' non significa che non esistano)di metodi per evitarli(a parte usare un filesystem che non sia ntfs,ma non è praticamente attuabile),l unica cosa che puoi fare secondo me è tenerli sotto controllo con una buona pulizia settimanale che ti portera' via pochissimo tempo se la farai costantemente.buona pasqua.

Buonasera,
ho lo stesso problema con offerbox.exe
ho eseguito una scansione con malwarebytes, con dr web cureit e con cccleaner ma non sono riuscito a risolvere.

vi posto il Logfile di HijackThis v2.0.4

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 0.08.46, on 22/03/2011
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
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\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Matrox Graphics Inc\PowerDesk SE\Matrox.PowerDesk SE.exe
C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 2010\avp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 2010\avp.exe
C:\Programmi\Java\jre6\bin\jqs.exe
c:\Programmi\Matrox Graphics Inc\PowerDesk\Services\Matrox.PowerDesk.Services.exe
c:\Programmi\Matrox Graphics Inc\PowerDesk SE\Matrox.Pdesk.ServicesHost.exe
C:\WINDOWS\system32\mgabg.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\File comuni\Microsoft Shared\Windows Live\WLIDSVC.EXE
C:\WINDOWS\system32\SearchIndexer.exe
C:\Programmi\File comuni\Microsoft Shared\Windows Live\WLIDSvcM.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\OfferBox\OfferBox.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Programmi\Mozilla Firefox\plugin-container.exe
C:\Programmi\Trend Micro\HiJackThis\HiJackThis.exe
C:\WINDOWS\system32\SearchProtocolHost.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
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
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = https://a248.e.akamai.net/f/674/9206/0/www2.ati.com/drivers/10-2_legacy_xp32-64_dd_ccc.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Programmi\File comuni\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: IEVkbdBHO - {59273AB4-E7D3-40F9-A1A8-6FA9CCA1862C} - C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 2010\ievkbd.dll
O2 - BHO: Guida per l'accesso a Windows Live ID - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: SkypeIEPluginBHO - {AE805869-2E5C-4ED4-8F7B-F1F7851A4497} - C:\Programmi\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Programmi\Java\jre6\bin\jp2ssv.dll
O2 - BHO: link filter bho - {E33CF602-D945-461A-83F0-819F76A199F8} - C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 2010\klwtbbho.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Programmi\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [Matrox PowerDesk SE] "c:\Programmi\Matrox Graphics Inc\PowerDesk SE\Matrox.PowerDesk SE.exe"
O4 - HKLM\..\Run: [avp] "C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 2010\avp.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Programmi\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Programmi\File comuni\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-19\..\RunOnce: [nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-20\..\RunOnce: [nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [nltide_3] rundll32 advpack.dll,LaunchINFSectionEx nLite.inf,C,,4,N (User 'Default user')
O8 - Extra context menu item: Aggiungi ad Anti-Banner - C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 2010\ie_banner_deny.htm
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: &Tastiera Virtuale - {4248FE82-7FCB-46AC-B270-339F08212110} - C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 2010\klwtbbho.dll
O9 - Extra button: Skype Plug-In - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Programmi\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra 'Tools' menuitem: Skype Plug-In - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Programmi\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: C&ontrollo URL - {CCF151D8-D089-449F-A5A4-D9909053F20F} - C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 2010\klwtbbho.dll
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} - 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
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1270664136140
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1270663625250
O18 - Protocol: skype-ie-addon-data - {91774881-D725-4E58-B298-07617B9B86A8} - C:\Programmi\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FILECO~1\Skype\SKYPE4~1.DLL
O20 - AppInit_DLLs: C:\PROGRA~1\KASPER~1\KASPER~1\mzvkbd3.dll, C:\PROGRA~1\KASPER~1\KASPER~1\kloehk.dll
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: AMService - Unknown owner - C:\WINDOWS\TEMP\tfto\setup.exe (file missing)
O23 - Service: Kaspersky Internet Security (AVP) - Kaspersky Lab - C:\Programmi\Kaspersky Lab\Kaspersky Internet Security 2010\avp.exe
O23 - Service: FLEXnet Licensing Service - Acresso Software Inc. - C:\Programmi\File comuni\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Programmi\Java\jre6\bin\jqs.exe
O23 - Service: Matrox Centering Service - Matrox Graphics Inc. - c:\Programmi\Matrox Graphics Inc\PowerDesk\Services\Matrox.PowerDesk.Services.exe
O23 - Service: Matrox.Pdesk.ServicesHost - Matrox Graphics Inc - c:\Programmi\Matrox Graphics Inc\PowerDesk SE\Matrox.Pdesk.ServicesHost.exe
O23 - Service: MGABGEXE - Matrox Graphics Inc. - C:\WINDOWS\system32\mgabg.exe

--
End of file - 8558 bytes


Grazie anticipatamente per quanto potrete fare!