Logfile of HijackThis v1.99.0
Scan saved at 20.44.09, on 20/06/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\S24EvMon.exe
C:\WINDOWS\system32\ZCfgSvc.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
C:\Programmi\Alwil Software\Avast4\ashServ.exe
C:\Programmi\Ahead\InCD\InCDsrv.exe
C:\WINDOWS\System32\RegSrvc.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\ZONELABS\vsmon.exe
C:\WINDOWS\system32\dcomcfg.exe
C:\WINDOWS\ATK0100\Hcontrol.exe
C:\Programmi\ASUS\ASUS Live Update\ALU.exe
C:\Programmi\Synaptics\SynTP\SynTPLpr.exe
C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
C:\Progra~1\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Programmi\Intel\PROSetWireless\NCS\PROSet\PRONoMgr.exe
C:\Programmi\Ahead\InCD\InCD.exe
C:\Programmi\Alcatel\SpeedTouch USB\Dragdiag.exe
C:\Programmi\Hewlett-Packard\HP Share-to-Web\hpgs2wnd.exe
C:\Programmi\QuickTime\qttask.exe
C:\Programmi\iTunes\iTunesHelper.exe
C:\Programmi\Hewlett-Packard\HP Share-to-Web\hpgs2wnf.exe
C:\Programmi\Java\jre1.5.0_06\bin\jusched.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\System32\1XConfig.exe
C:\WINDOWS\system32\LVCOMSX.EXE
C:\WINDOWS\ATK0100\ATKOSD.exe
C:\Programmi\Logitech\Video\LogiTray.exe
C:\Programmi\File comuni\Real\Update_OB\realsched.exe
C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe
C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
C:\Programmi\Asus\Asus ChkMail\ChkMail.exe
C:\Programmi\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
C:\Programmi\iPod\bin\iPodService.exe
C:\Programmi\Logitech\Video\FxSvr2.exe
C:\Programmi\Hewlett-Packard\Digital Imaging\bin\hpoevm08.exe
C:\Programmi\Hewlett-Packard\Digital Imaging\Bin\hpoSTS08.exe
C:\WINDOWS\system32\HPZipm12.exe
C:\Programmi\MSN Messenger\msnmsgr.exe
C:\Documents and Settings\Pepuccio\Desktop\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://g.msn.it/0SEITIT/SAOS01
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.asus.com.tw
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: Nothing - {b0398eca-0bcd-4645-8261-5e9dc70248d0} - C:\WINDOWS\system32\hpF550.tmp (file missing)
O4 - HKLM\..\Run: [Hcontrol] C:\WINDOWS\ATK0100\Hcontrol.exe
O4 - HKLM\..\Run: [ATIModeChange] Ati2mdxx.exe
O4 - HKLM\..\Run: [ASUS Live Update] C:\Programmi\ASUS\ASUS Live Update\ALU.exe
O4 - HKLM\..\Run: [SynTPLpr] C:\Programmi\Synaptics\SynTP\SynTPLpr.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [ATIPTA] C:\Progra~1\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [PRONoMgr.exe] c:\Programmi\Intel\PROSetWireless\NCS\PROSet\PRONoMgr.exe
O4 - HKLM\..\Run: [InCD] C:\Programmi\Ahead\InCD\InCD.exe
O4 - HKLM\..\Run: [Diagnostica SpeedTouch USB] "C:\Programmi\Alcatel\SpeedTouch USB\Dragdiag.exe" /icon
O4 - HKLM\..\Run: [Power_Gear] C:\Programmi\ASUS\Power4 Gear\BatteryLife.exe 1
O4 - HKLM\..\Run: [Share-to-Web Namespace Daemon] C:\Programmi\Hewlett-Packard\HP Share-to-Web\hpgs2wnd.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] C:\Programmi\iTunes\iTunesHelper.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [LVCOMSX] C:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [LogitechVideoRepair] C:\Programmi\Logitech\Video\ISStart.exe
O4 - HKLM\..\Run: [LogitechVideoTray] C:\Programmi\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Programmi\File comuni\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [Zone Labs Client] C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe
O4 - HKCU\..\Run: [LogitechSoftwareUpdate] C:\Programmi\Logitech\Video\ManifestEngine.exe boot
O4 - Global Startup: ASUS ChkMail.lnk = C:\Programmi\Asus\Asus ChkMail\ChkMail.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Programmi\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: hp psc 2000 Series.lnk = C:\Programmi\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
O4 - Global Startup: Logitech Desktop Messenger.lnk = C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LDMConf.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
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
O14 - IERESET.INF: START_PAGE_URL=http://www.asus.com.tw
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: avast! iAVS4 Control Service - Unknown - C:\Programmi\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: Ati HotKey Poller - Unknown - C:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: avast! Antivirus - Unknown - C:\Programmi\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Programmi\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Programmi\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: InCD Helper - AHEAD Software - C:\Programmi\Ahead\InCD\InCDsrv.exe
O23 - Service: Servizio iPod - Apple Computer, Inc. - C:\Programmi\iPod\bin\iPodService.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: RegSrvc - Intel Corporation - C:\WINDOWS\System32\RegSrvc.exe
O23 - Service: Spectrum24 Event Monitor - Intel Corporation - C:\WINDOWS\System32\S24EvMon.exe
O23 - Service: TrueVector Internet Monitor - Zone Labs, LLC - C:\WINDOWS\system32\ZONELABS\vsmon.exe

Ciao,
il log lo hai fatto con una versione vecchia di hijackthis , scarica la nuova e riposta il log aggiornato , anche se già si vede che hai qualche trojan
http://www.hijackthis.de/downloads/hijackthis_199.zip