Thank you for your quick answer. Here it is the hijackthis log.
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 12:59:37, on 20/07/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
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:\Program Files\Thomson SpeedTouch\ST330\service\st330service.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\Program Files\Norton SystemWorks\Norton AntiVirus\navapsvc.exe
C:\Program Files\Norton SystemWorks\Norton Utilities\NPROTECT.EXE
C:\PROGRA~1\NORTON~2\SPEEDD~1\nopdb.exe
C:\Program Files\Common Files\Symantec Shared\Security Center\SymWSC.exe
C:\WINDOWS\system32\WgaTray.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\spool\drivers\w32x86\3\hpztsb07.exe
C:\Program Files\Winamp\winampa.exe
C:\Program Files\CyberLink\PowerDVD\PDVDServ.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Adobe\Photoshop Album Starter Edition\3.0\Apps\apdproxy.exe
C:\Program Files\Thomson SpeedTouch\ST330\diagnostics\diagnostics.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Common Files\Ahead\lib\NMBgMonitor.exe
C:\WINDOWS\system32\svchost.exe
C:\PROGRA~1\Yahoo!\MESSEN~1\YAHOOM~1.EXE
C:\Program Files\Yahoo!\Search Protection\SearchProtection.exe
C:\Program Files\MediaKey v2.00\Versato.exe
C:\Program Files\Sony\Sony Picture Utility\VolumeWatcher\SPUVolumeWatcher.exe
C:\Program Files\MediaKey v2.00\MePlayer.exe
C:\Program Files\MediaKey v2.00\OSD.EXE
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Documents and Settings\Ruxandra.TEO\Desktop\HiJackThis.exe
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
http://www.yahoomail.com/
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: Yahoo! IE Services Button - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll
O2 - BHO: CNavExtBho Class - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton SystemWorks\Norton AntiVirus\NavShExt.dll
O2 - BHO: QUICKfind BHO Object - {C08DF07A-3E49-4E25-9AB0-D3882835F153} - C:\PROGRA~1\TEXTware\QUICKF~1\PlugIns\IEHelp.dll (file missing)
O2 - BHO: ImplementBHO Class - {EFA8BFF4-AB8A-4fac-9AAC-2098C3665E77} - C:\PROGRA~1\MYXDES~1\SFTCOM~1.DLL
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton SystemWorks\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O4 - HKLM\..\Run: [ccApp] C:\Program Files\Common Files\Symantec Shared\ccApp.exe
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\System32\spool\drivers\w32x86\3\hpztsb07.exe
O4 - HKLM\..\Run: [WinampAgent] C:\Program Files\Winamp\winampa.exe
O4 - HKLM\..\Run: [RemoteControl] "C:\Program Files\CyberLink\PowerDVD\PDVDServ.exe"
O4 - HKLM\..\Run: [NeroFilterCheck] C:\Program Files\Common Files\Ahead\Lib\NeroCheck.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [Adobe Photo Downloader] "C:\Program Files\Adobe\Photoshop Album Starter Edition\3.0\Apps\apdproxy.exe"
O4 - HKLM\..\Run: [diagnostics] "C:\Program Files/Thomson SpeedTouch/ST330/diagnostics/diagnostics.exe" /icon -l:en
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [BioniXWallpaper] "C:\Documents and Settings\Ruxandra.TEO\My Documents\My Documents\My Documents\Bionix Wallpaper\Program Files\BioniX Wallpaper v4.60\BioniX Wallper.exe"
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Program Files\Common Files\Ahead\lib\NMBgMonitor.exe"
O4 - HKCU\..\Run: [Yahoo! Pager] "C:\PROGRA~1\Yahoo!\MESSEN~1\YAHOOM~1.EXE" -quiet
O4 - HKCU\..\Run: [YSearchProtection] C:\Program Files\Yahoo!\Search Protection\SearchProtection.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'NETWORK SERVICE')
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: Picture Motion Browser Media Check Tool.lnk = C:\Program Files\Sony\Sony Picture Utility\VolumeWatcher\SPUVolumeWatcher.exe
O4 - Global Startup: Genius Multimedia Keyboard Driver.lnk = C:\Program Files\MediaKey v2.00\Versato.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: E&xport to Microsoft Excel -
res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: Yahoo! Services - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra button: myX Desktop - {A926C757-2213-4B54-98C8-9620BA55A830} - C:\PROGRA~1\MYXDES~1\SFTSLT~1.DLL (HKCU)
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (Installation Support) - C:\Program Files\Yahoo!\Common\Yinsthelper.dll
O17 - HKLM\System\CCS\Services\Tcpip\..\{D4D1D6AD-48CB-403C-840D-89052165E396}: NameServer = 193.231.100.130 193.231.100.134
O20 - Winlogon Notify: !SASWinLogon - C:\Program Files\SUPERAntiSpyware\SASWINLO.dll
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Norton AntiVirus Auto Protect Service (navapsvc) - Symantec Corporation - C:\Program Files\Norton SystemWorks\Norton AntiVirus\navapsvc.exe
O23 - Service: Norton Unerase Protection (NProtectService) - Symantec Corporation - C:\Program Files\Norton SystemWorks\Norton Utilities\NPROTECT.EXE
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\COMMON~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: Speed Disk service - Symantec Corporation - C:\PROGRA~1\NORTON~2\SPEEDD~1\nopdb.exe
O23 - Service: SpeedTouch 330 Manager (st330service) - THOMSON Telecom Belgium - C:\Program Files/Thomson SpeedTouch/ST330/service/st330service.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\Security Center\SymWSC.exe
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End of file - 7262 bytes