allego il file log
p.s. non so se va bene posarlo qui'

ditemelo altrimenti lo poso in altro forum.
grazie ancora
Mario





Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 13.44.16, on 14/05/2011
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:\Programmi\Microsoft Security Client\Antimalware\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Java\jre6\bin\jqs.exe
C:\Programmi\Microsoft LifeCam\MSCamS32.exe
C:\Programmi\CDBurnerXP\NMSAccessU.exe
C:\Programmi\Norton Safe Web Lite\Engine\1.2.0.6\ccSvcHst.exe
C:\WINDOWS\Samsung\PanelMgr\SSMMgr.exe
C:\PROGRA~1\ALICET~1\SMARTB~1\MotiveSB.exe
C:\Programmi\Seagate\DiscWizard\DiscWizardMonitor.exe
C:\Programmi\Seagate\DiscWizard\TimounterMonitor.exe
C:\Programmi\File comuni\Seagate\Schedule2\schedhlp.exe
C:\Programmi\File comuni\Java\Java Update\jusched.exe
C:\Programmi\File comuni\alg.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\Programmi\Microsoft Security Client\msseces.exe
C:\Programmi\File comuni\Seagate\Schedule2\schedul2.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Gadwin Systems\PrintScreen\PrintScreen.exe
C:\WINDOWS\System32\svchost.exe
C:\Documents and Settings\MARCO\Documenti\PORTABLE\PNotesPortable\App\PNotes\PNotes.exe
D:\HjackThis\HijackThis.exe

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
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
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: 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
O2 - BHO: Norton Safe Web Lite BHO - {F0DA78E9-6B60-42fb-BC26-EF2CFB8C8FF3} - C:\Programmi\Norton Safe Web Lite\Engine\1.2.0.6\coIEPlg.dll
O3 - Toolbar: Norton Safe Web Lite - {30CEEEA2-3742-40e4-85DD-812BF1CBB83D} - C:\Programmi\Norton Safe Web Lite\Engine\1.2.0.6\coIEPlg.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [Samsung PanelMgr] C:\WINDOWS\Samsung\PanelMgr\SSMMgr.exe /autorun
O4 - HKLM\..\Run: [Motive SmartBridge] C:\PROGRA~1\ALICET~1\SMARTB~1\MotiveSB.exe
O4 - HKLM\..\Run: [DiscWizardMonitor.exe] C:\Programmi\Seagate\DiscWizard\DiscWizardMonitor.exe
O4 - HKLM\..\Run: [AcronisTimounterMonitor] C:\Programmi\Seagate\DiscWizard\TimounterMonitor.exe
O4 - HKLM\..\Run: [Seagate Scheduler2 Service] "C:\Programmi\File comuni\Seagate\Schedule2\schedhlp.exe"
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [LifeCam] "C:\Programmi\Microsoft LifeCam\LifeExp.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\File comuni\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [Application Layer Gateway] C:\Programmi\File comuni\alg.exe
O4 - HKLM\..\Run: [MSC] "C:\Programmi\Microsoft Security Client\msseces.exe" -hide -runkey
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Gadwin PrintScreen] C:\Programmi\Gadwin Systems\PrintScreen\PrintScreen.exe /nosplash
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SERVIZIO DI RETE')
O4 - HKUS\S-1-5-18\..\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: PNotes.lnk = C:\Documents and Settings\MARCO\Documenti\PORTABLE\PNotesPortable\PNotesPortable.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\OFFICE11\REFIEBAR.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
O15 - Trusted Zone: http://asia.msi.com.tw
O15 - Trusted Zone: http://global.msi.com.tw
O16 - DPF: {8167C273-DF59-4416-B647-C8BB2C7EE83E} (WebSDev Control) - http://liveupdate.msi.com.tw/autobios/LOnline/install.cab
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FILECO~1\Skype\SKYPE4~1.DLL
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Programmi\Java\jre6\bin\jqs.exe
O23 - Service: NMSAccess - Unknown owner - C:\Programmi\CDBurnerXP\NMSAccessU.exe
O23 - Service: Norton Safe Web Lite (NSL) - Symantec Corporation - C:\Programmi\Norton Safe Web Lite\Engine\1.2.0.6\ccSvcHst.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: ServiceLayer - Nokia - C:\Programmi\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: Seagate Scheduler2 Service (SgtSch2Svc) - Seagate - C:\Programmi\File comuni\Seagate\Schedule2\schedul2.exe

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End of file - 6364 bytes

Ciao mario_bra, oltre alla scansione del normale antivirus, ogni tanto, cerca di fare una scansione completa con questo ottimo antimalware.

Infine, i vari log relativi ai software di sicurezza, postali nella sezione "sicurezza virus"

Ciao

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Comunque alg.exe è un file legittimo di Windows e si trova nella cartella C:\Windows\System32,comincia diventare sospetto quando lo troviamo in una sottocartella e ancor di più quando lo troviamo in C Windows.