Ho avviato il pc lento e subito ho notato che aveva un'impostazione video diversa da quella del giorno precedente quando l'ho spento (non era 1152x864 ma più grande) e non sono riuscito a trovare la stessa impostazione; inoltre tutte le icone erano sparse e non in ordine come prima.
Avvio firefox e i preferiti, le password e tutto sono spariti, oltre che avere la configurazione come se l'avessi ripristinato.
Come se non bastasse mi appare la richiesta di installare dei componenti della stampante con il cd che, in realtà c'erano già.
Ho fatto il ripristino della configurazione del sistema, inpostandolo un mese prima circa ma, senza risultato.
Vorrei sapere che cosa puo essere successo e come rimediare.
Grazie

Aggiungo il log di Hijackthis, sperando che possa essere utile:

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 17.03.17, on 18/09/2014
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\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\AskPartnerNetwork\Toolbar\apnmcp.exe
C:\Programmi\File comuni\Apple\Mobile Device Support\AppleMobileDeviceService.exe
C:\Programmi\Bonjour\mDNSResponder.exe
C:\Programmi\Garmin\Core Update Service\Garmin.Cartography.MapUpdate.CoreService.exe
C:\Programmi\Java\jre7\bin\jqs.exe
C:\Programmi\Norton 360\Norton 360\Engine\21.5.0.19\N360.exe
C:\Programmi\Nero\Nero8\Nero BackItUp\NBService.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\PSIService.exe
C:\Documents and Settings\All Users\Dati applicazioni\Skype\Toolbars\Skype C2C Service\c2c_service.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Canon\CAL\CALMAIN.exe
C:\WINDOWS\RTHDCPL.EXE
C:\WINDOWS\system32\VTTimer.exe
C:\WINDOWS\system32\S3trayp.exe
C:\Programmi\Google\Google Desktop Search\GoogleDesktop.exe
C:\Programmi\iTunes\iTunesHelper.exe
C:\Programmi\Google\Google Desktop Search\GoogleDesktop.exe
C:\Programmi\HP\HP Software Update\HPWuSchd2.exe
C:\Programmi\Samsung\Kies\KiesTrayAgent.exe
C:\Programmi\File comuni\Java\Java Update\jusched.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Programmi\AskPartnerNetwork\Toolbar\Updater\TBNotifier.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\iPod\bin\iPodService.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Programmi\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
C:\Programmi\Gadwin Systems\PrintScreen\PrintScreen.exe
C:\Programmi\Google\Drive\googledrivesync.exe
C:\Programmi\Garmin\Express Tray\ExpressTray.exe
C:\Programmi\Norton 360\Norton 360\Engine\21.5.0.19\N360.exe
C:\Programmi\Skype\Phone\Skype.exe
C:\Programmi\Samsung\Kies\Kies.exe
C:\Documents and Settings\Mora\Dati applicazioni\Dropbox\bin\Dropbox.exe
C:\Programmi\Spamihilator\spamihilator.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\Google\Drive\googledrivesync.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\Programmi\HP\Digital Imaging\bin\hpqtra08.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\HP\Digital Imaging\bin\hpqSTE08.exe
C:\Programmi\HP\Digital Imaging\bin\hpqbam08.exe
C:\Programmi\HP\Digital Imaging\bin\hpqgpc01.exe
C:\Programmi\Trend Micro\HijackThis\HiJackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
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://search.findeer.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: uTorrentBar_IT Toolbar - {4ae0c3d6-f713-4eed-bc65-25dc3ffdaac1} - (no file)
O2 - BHO: HP Print Enhancer - {0347C33E-8762-4905-BF09-768834316C61} - C:\Programmi\HP\Digital Imaging\Smart Web Printing\hpswp_printenhancer.dll
O2 - BHO: uTorrentBar_IT - {4ae0c3d6-f713-4eed-bc65-25dc3ffdaac1} - (no file)
O2 - BHO: Norton Identity Protection - {602ADB0E-4AFF-4217-8AA1-95DAC4DFA408} - C:\Programmi\Norton 360\Norton 360\Engine\21.5.0.19\coIEPlg.dll
O2 - BHO: Norton Vulnerability Protection - {6D53EC84-6AAE-4787-AEEE-F4628F01010C} - C:\Programmi\Norton 360\Norton 360\Engine\21.5.0.19\IPS\IPSBHO.DLL
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre7\bin\ssv.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\jre7\bin\jp2ssv.dll
O2 - BHO: HP Smart BHO Class - {FFFFFFFF-CF4E-4F2B-BDC2-0E72E116A856} - C:\Programmi\HP\Digital Imaging\Smart Web Printing\hpswp_BHO.dll
O3 - Toolbar: uTorrentBar_IT Toolbar - {4ae0c3d6-f713-4eed-bc65-25dc3ffdaac1} - (no file)
O3 - Toolbar: Norton Toolbar - {7FEBEFE3-6B19-4349-98D2-FFB09D4B49CA} - C:\Programmi\Norton 360\Norton 360\Engine\21.5.0.19\coIEPlg.dll
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [VTTimer] VTTimer.exe
O4 - HKLM\..\Run: [S3Trayp] S3trayp.exe
O4 - HKLM\..\Run: [Kernel and Hardware Abstraction Layer] KHALMNPR.EXE
O4 - HKLM\..\Run: [Google Desktop Search] "C:\Programmi\Google\Google Desktop Search\GoogleDesktop.exe" /startup
O4 - HKLM\..\Run: [iTunesHelper] "C:\Programmi\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Programmi\File comuni\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [APSDaemon] "C:\Programmi\File comuni\Apple\Apple Application Support\APSDaemon.exe"
O4 - HKLM\..\Run: [ApnUpdater] "C:\Programmi\Ask.com\Updater\Updater.exe"
O4 - HKLM\..\Run: [HP Software Update] C:\Programmi\HP\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [KiesTrayAgent] C:\Programmi\Samsung\Kies\KiesTrayAgent.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\File comuni\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [ApnTBMon] "C:\Programmi\AskPartnerNetwork\Toolbar\Updater\TBNotifier.exe"
O4 - HKLM\..\RunOnce: [] C:\Programmi\HP\Print Projects\Common01\Bin\HpqWLPG03.exe /WebOffer
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [LDM] C:\Programmi\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
O4 - HKCU\..\Run: [Gadwin PrintScreen] C:\Programmi\Gadwin Systems\PrintScreen\PrintScreen.exe /nosplash
O4 - HKCU\..\Run: [GoogleDriveSync] "C:\Programmi\Google\Drive\googledrivesync.exe" /autostart
O4 - HKCU\..\Run: [GarminExpressTrayApp] "C:\Programmi\Garmin\Express Tray\ExpressTray.exe"
O4 - HKCU\..\Run: [Skype] "C:\Programmi\Skype\Phone\Skype.exe" /minimized /regrun
O4 - HKCU\..\Run: [KiesPreload] C:\Programmi\Samsung\Kies\Kies.exe /preload
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: Dropbox.lnk = C:\Documents and Settings\Mora\Dati applicazioni\Dropbox\bin\Dropbox.exe
O4 - Startup: Spamihilator.lnk = C:\Programmi\Spamihilator\spamihilator.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Programmi\HP\Digital Imaging\bin\hpqtra08.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Skype Click to Call - {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: Visualizza o nasconde HP Smart Web Printing - {DDE87865-83C5-48c4-8357-2F5B1AA84522} - C:\Programmi\HP\Digital Imaging\Smart Web Printing\hpswp_BHO.dll
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://www.update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1203603426140
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{B44B0011-3A8A-488B-A2A1-768213C845AE}: NameServer = 8.8.8.8,8.8.4.4
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\google\google~1\goec62~1.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: Adobe LM Service - Adobe Systems - C:\Programmi\File comuni\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\WINDOWS\system32\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: Servizio di aggiornamento Ask (APNMCP) - APN LLC. - C:\Programmi\AskPartnerNetwork\Toolbar\apnmcp.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Programmi\File comuni\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: Servizio Bonjour (Bonjour Service) - Apple Inc. - C:\Programmi\Bonjour\mDNSResponder.exe
O23 - Service: Canon Camera Access Library 8 (CCALib8) - Canon Inc. - C:\Programmi\Canon\CAL\CALMAIN.exe
O23 - Service: Garmin Core Update Service - Garmin Ltd or its subsidiaries - C:\Programmi\Garmin\Core Update Service\Garmin.Cartography.MapUpdate.CoreService.exe
O23 - Service: Google Desktop Manager 5.9.1005.12335 (GoogleDesktopManager-051210-111108) - Google - C:\Programmi\Google\Google Desktop Search\GoogleDesktop.exe
O23 - Service: Servizio Google Update (gupdate) (gupdate) - Google Inc. - C:\Programmi\Google\Update\GoogleUpdate.exe
O23 - Service: Servizio Google Update (gupdatem) (gupdatem) - Google Inc. - C:\Programmi\Google\Update\GoogleUpdate.exe
O23 - Service: Servizio iPod (iPod Service) - Apple Inc. - C:\Programmi\iPod\bin\iPodService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Oracle Corporation - C:\Programmi\Java\jre7\bin\jqs.exe
O23 - Service: Logitech Bluetooth Service (LBTServ) - Logitech, Inc. - C:\Programmi\File comuni\Logitech\Bluetooth\LBTServ.exe
O23 - Service: Mozilla Maintenance Service (MozillaMaintenance) - Mozilla Foundation - C:\Programmi\Mozilla Maintenance Service\maintenanceservice.exe
O23 - Service: Norton 360 (N360) - Symantec Corporation - C:\Programmi\Norton 360\Norton 360\Engine\21.5.0.19\N360.exe
O23 - Service: Nero BackItUp Scheduler 3 - Nero AG - C:\Programmi\Nero\Nero8\Nero BackItUp\NBService.exe
O23 - Service: NMIndexingService - Nero AG - C:\Programmi\File comuni\Nero\Lib\NMIndexingService.exe
O23 - Service: ProtexisLicensing - Unknown owner - C:\WINDOWS\system32\PSIService.exe
O23 - Service: Skype C2C Service - Skype Technologies S.A. - C:\Documents and Settings\All Users\Dati applicazioni\Skype\Toolbars\Skype C2C Service\c2c_service.exe
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Programmi\Skype\Updater\Updater.exe

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