salve a tutti
da qualche giorno si è un po' rallentato e il refresh (si dice così?) delle finestre quando se ne chiude una è po' lento;
allego log per una verifica se occorre togliere qualcosa, allego anche log dell'avvio
(fatta scansione con malw.b:tutto negativo)
un grazie anticipato

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 19.49.30, on 11/09/2012
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Microsoft Security Client\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programmi\SUPERAntiSpyware\SASCORE.EXE
C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
C:\Programmi\File comuni\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Programmi\PC Tools Firewall Plus\FWService.exe
C:\WINDOWS\PMJ151LA.BIN
C:\Programmi\Macrium\Reflect\ReflectService.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\wuauclt.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\rundll32.exe
C:\Programmi\PC Tools Firewall Plus\FirewallGUI.exe
C:\Programmi\Microsoft Security Client\msseces.exe
C:\WINDOWS\system32\ctfmon.exe
C:\PROGRA~1\WinZip\winzip32.exe
C:\DOCUME~1\Mauro\IMPOST~1\Temp\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://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1
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: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Guida per l'accesso a Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: WOT Helper - {C920E44A-7F78-4E64-BDD7-A57026E7FEB7} - C:\Programmi\WOT\WOT.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Programmi\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Programmi\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: WOT - {71576546-354D-41c9-AAE8-31F2EC22BF0D} - C:\Programmi\WOT\WOT.dll
O4 - HKLM\..\Run: [BluetoothAuthenticationAgent] rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
O4 - HKLM\..\Run: [00PCTFW] "C:\Programmi\PC Tools Firewall Plus\FirewallGUI.exe" -s
O4 - HKLM\..\Run: [MSC] "C:\Programmi\Microsoft Security Client\msseces.exe" -hide -runkey
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
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')
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.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: 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: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{5296BEBE-FB2F-47A6-BADA-0DA237AD820F}: NameServer = 212.216.112.112,212.216.172.62
O18 - Protocol: wot - {C2A44D6B-CB9F-4663-88A6-DF2F26E4D952} - C:\Programmi\WOT\WOT.dll
O23 - Service: SAS Core Service (!SASCORE) - SUPERAntiSpyware.com - C:\Programmi\SUPERAntiSpyware\SASCORE.EXE
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: EPSON Printer Status Agent2 (EPSONStatusAgent2) - SEIKO EPSON CORPORATION - C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
O23 - Service: PC Tools Firewall Plus (PCToolsFirewallPlus) - PC Tools - C:\Programmi\PC Tools Firewall Plus\FWService.exe
O23 - Service: PMJ151 AutoLaunch Service (PMJ151LA) - Matsushita Electric Industrial Co. ,Ltd, - C:\WINDOWS\PMJ151LA.BIN
O23 - Service: Macrium Reflect Image Mounting Service (ReflectService) - Unknown owner - C:\Programmi\Macrium\Reflect\ReflectService.exe

--
End of file - 5206 bytes


log avvio

No HKCU:Run browserchoice Microsoft Corporation "C:\WINDOWS\system32\browserchoice.exe" /run
Si HKCU:Run ctfmon.exe Microsoft Corporation C:\WINDOWS\system32\ctfmon.exe
No HKCU:Run msmsgs Microsoft Corporation "C:\Programmi\Messenger\msmsgs.exe" /background
No HKCU:Run NMBgMonitor Nero AG "C:\Programmi\File comuni\Ahead\lib\NMBgMonitor.exe"
Si HKLM:Run 00PCTFW PC Tools "C:\Programmi\PC Tools Firewall Plus\FirewallGUI.exe" -s
No HKLM:Run AdobeARM Adobe Systems Incorporated "C:\Programmi\File comuni\Adobe\ARM\1.0\AdobeARM.exe"
Si HKLM:Run BluetoothAuthenticationAgent Microsoft Corporation rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
No HKLM:Run dumprep 0 -u %systemroot%\system32\dumprep 0 -u
No HKLM:Run jusched Sun Microsystems, Inc. "C:\Programmi\File comuni\Java\Java Update\jusched.exe"
No HKLM:Run KiesTrayAgent Samsung Electronics Co., Ltd. C:\Programmi\Samsung\Kies\KiesTrayAgent.exe
Si HKLM:Run MSC Microsoft Corporation "C:\Programmi\Microsoft Security Client\msseces.exe" -hide -runkey
No HKLM:Run qttask Apple Computer, Inc. "C:\Programmi\QuickTime\qttask.exe" -atboottime
Si HKLM:Run QuickTime Task Apple Computer, Inc. "C:\Programmi\QuickTime\qttask.exe" -atboottime
No HKLM:Run Reader_sl Adobe Systems Incorporated "C:\Programmi\Adobe\Reader 9.0\Reader\Reader_sl.exe"
No HKLM:Run UpdateReminder C:\Programmi\Eset\UpdateReminder.exe

Tutto a posto, volendo potresti eliminare la toolbar di Wot e dall'avvio disattivare QuickTime.
Pulisci con Ccleaner e deframmenta il disco. Ciao