The problem has returned,
I run the microsoft most recent tool (tip by chrisjea) and I don't find any malware.
After that I run the software HIJACKTHIS (tip by Ironbender).
Now I am posting the logfile:
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Logfile of HijackThis v1.99.1
Scan saved at 16:33:57, on 31/8/2005
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)
Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\spoolsv.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccSetMgr.exe
C:\Arquivos de programas\Symantec AntiVirus\DefWatch.exe
C:\Arquivos de programas\Executive Software\DiskeeperLite\DKService.exe
C:\WINNT\System32\svchost.exe
C:\WINNT\system32\regsvc.exe
C:\Arquivos de programas\Symantec AntiVirus\SavRoam.exe
C:\WINNT\system32\MSTask.exe
C:\Arquivos de programas\Symantec AntiVirus\Rtvscan.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\system32\svchost.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccEvtMgr.exe
C:\WINNT\Explorer.EXE
C:\WINNT\system32\pctspk.exe
C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccApp.exe
C:\ARQUIV~1\SYMANT~1\VPTray.exe
C:\WINNT\system32\internat.exe
C:\Arquivos de programas\MSN Messenger\MsnMsgr.Exe
C:\Arquivos de programas\Hewlett-Packard\LaserJet All-in-one\hppdirector.exe
C:\WINNT\system32\hppapml0.exe
C:\WINNT\system32\NOTEPAD.EXE
C:\Arquivos de programas\Internet Explorer\IEXPLORE.EXE
\Servidor\Charles\HijackThis\HijackThis.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = &http://home.microsoft.com/intl/br/access/allinone.asp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = &http://home.microsoft.com/intl/br/access/allinone.asp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = &http://home.microsoft.com/intl/br/access/allinone.asp
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Arquivos de programas\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: &iG - {7EEF1E3D-FD97-4401-BCDB-5827F2D11709} - C:\ARQUIV~1\iGv6\igshop.dll (file missing)
O2 - BHO: G-Buster Browser Defense - {C41A1C0E-EA6C-11D4-B1B8-444553540000} - C:\WINNT\Downloaded Program Files\gbieh.dll
O2 - BHO: G-Buster Browser Defense Real - {C41A1C0E-EA6C-11D4-B1B8-444553540007} - C:\WINNT\Downloaded Program Files\gbiehabn.dll
O3 - Toolbar: &Rádio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\system32\msdxm.ocx
O3 - Toolbar: &iG - {7EEF1E3D-FD97-4401-BCDB-5827F2D11709} - C:\ARQUIV~1\iGv6\igshop.dll (file missing)
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [PCTVOICE] pctspk.exe
O4 - HKLM\..\Run: [HP SchedIndexer] C:\Arquivos de programas\Hewlett-Packard\LaserJet All-in-one\hppschedindexer.exe
O4 - HKLM\..\Run: [HP AutoIndexer] C:\Arquivos de programas\Hewlett-Packard\LaserJet All-in-one\hppautoindexer.exe
O4 - HKLM\..\Run: [ccApp] "C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [vptray] C:\ARQUIV~1\SYMANT~1\VPTray.exe
O4 - HKCU\..\Run: [internat.exe] internat.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Arquivos de programas\MSN Messenger\MsnMsgr.Exe" /background
O4 - Global Startup: HP LaserJet Director.lnk = C:\Arquivos de programas\Hewlett-Packard\LaserJet All-in-one\hppdirector.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Arquivos de programas\Microsoft Office\Office\OSA9.EXE
O4 - Global Startup: Symantec Fax Starter Edition Port.lnk = C:\Arquivos de programas\Microsoft Office\Office\1046\OLFSNT40.EXE
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINNT\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINNT\web\related.htm
O9 - Extra button: Barra do iG - {FD1672E0-AE0D-465B-B345-F7B0944A121D} - C:\ARQUIV~1\iGv6\igshop.dll (file missing)
O14 - IERESET.INF: SEARCH_PAGE_URL=&http://home.microsoft.com/intl/br/access/allinone.asp
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) -
http://security.symantec.com/sscv6/SharedC...bin/AvSniff.cabO16 - DPF: {3C8B9651-4E3E-424D-B51C-54544ABF536B} (CAtmCap Object) -
https://netbanking2.banespa.com.br/OCX/Secu...reControl2k.cabO16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) -
http://update.microsoft.com/windowsupdate/...b?1124310407391O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) -
http://security.symantec.com/sscv6/SharedC...n/bin/cabsa.cabO16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) -
http://update.microsoft.com/microsoftupdat...b?1125409633125O16 - DPF: {88D969C0-F192-11D4-A65F-0040963251E5} (XML DOM Document 4.0) - file://C:\TempEI4\EI40_\msxml4.cab
O16 - DPF: {E37CB5F0-51F5-4395-A808-5FA49E399007} (GbPluginObj Class) -
https://wwws.realsecureweb.com.br/mpr/plugi...GbPluginABN.cabO16 - DPF: {E37CB5F0-51F5-4395-A808-5FA49E399F83} (GbPluginObj Class) -
https://www14.bancobrasil.com.br/plugin/GbPluginBb.cabO16 - DPF: {F00F4763-7355-4725-82F7-0DA94A256D46} (IncrediMail) -
http://www2.incredimail.com/contents/setup...er/imloader.cabO17 - HKLM\System\CCS\Services\Tcpip\Parameters: Domain = sorri.sorri
O17 - HKLM\System\CCS\Services\Tcpip\..\{DBA919D4-86E1-4AA7-9949-B15DF08732C7}: NameServer = 200.204.0.10,200.204.0.138
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: Domain = sorri.sorri
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: Domain = sorri.sorri
O20 - Winlogon Notify: NavLogon - C:\WINNT\System32\NavLogon.dll
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\ccSetMgr.exe
O23 - Service: Symantec AntiVirus Definition Watcher (DefWatch) - Symantec Corporation - C:\Arquivos de programas\Symantec AntiVirus\DefWatch.exe
O23 - Service: Diskeeper - Executive Software International, Inc. - C:\Arquivos de programas\Executive Software\DiskeeperLite\DKService.exe
O23 - Service: Serviço administrativo do gerenciador de disco lógico (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: SAVRoam (SavRoam) - symantec - C:\Arquivos de programas\Symantec AntiVirus\SavRoam.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Arquivos de programas\Arquivos comuns\Symantec Shared\SNDSrvc.exe
O23 - Service: Symantec AntiVirus - Symantec Corporation - C:\Arquivos de programas\Symantec AntiVirus\Rtvscan.exe
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Thanks for any help...