ti posto il log di hijackthis (so che mi sto approfittando di te, ma sei un angelo!! ):

Logfile of HijackThis v1.99.1
Scan saved at 23.11.25, on 08/05/2006
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

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\spoolsv.exe
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Programmi\iTunes\iTunesHelper.exe
C:\Programmi\QuickTime\qttask.exe
C:\Programmi\Java\jre1.5.0_06\bin\jusched.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Programmi\Messenger\msmsgs.exe
C:\Programmi\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
C:\Programmi\iPod\bin\iPodService.exe
C:\PROGRA~1\MOZILL~1\FIREFOX.EXE
C:\WINDOWS\System32\wuauclt.exe
C:\WINDOWS\System32\wuauclt.exe
C:\Programmi\WinRAR\WinRAR.exe
C:\DOCUME~1\ANNACH~1\IMPOST~1\Temp\Rar$EX00.828\Hi jackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://searchbar.findthewebsiteyouneed.com
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://go.microsoft.com/fwlink/?LinkId=519
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [ATIPTA] C:\Programmi\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [REGSHAVE] C:\Programmi\REGSHAVE\REGSHAVE.EXE /AUTORUN
O4 - HKLM\..\Run: [iTunesHelper] "C:\Programmi\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\RunServices: [csr] csrrs.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Programmi\Messenger\msmsgs.exe" /background
O4 - Global Startup: Acrobat Assistant.lnk = C:\Programmi\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Programmi\File comuni\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: EPSON Status Monitor 3 Environment Check 2.lnk = C:\WINDOWS\system32\spool\drivers\w32x86\3\E_SRCV0 2.EXE
O8 - Extra context menu item: &Google Search - res://C:\Programmi\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: Backward &Links - res://C:\Programmi\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Cac&hed Snapshot of Page - res://C:\Programmi\Google\GoogleToolbar1.dll/cmcache.html
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Si&milar Pages - res://C:\Programmi\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Translate into English - res://C:\Programmi\Google\GoogleToolbar1.dll/cmtrans.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_06\bin\ssv.dll
O9 - Extra button: Ricerche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O12 - Plugin for .spop: C:\Programmi\Internet Explorer\Plugins\NPDocBox.dll
O16 - DPF: {F9043C85-F6F2-101A-A3C9-08002B2F49FB} (Microsoft Common Dialog Control, version 5.0 (SP2)) - file://C:\Programmi\OpenCube\Visual Infinite Menus\comdlg32.cab
O20 - Winlogon Notify: ShellScrap - C:\WINDOWS\system32\m246lchs1f46.dll
O23 - Service: Adobe LM Service - Unknown owner - C:\Programmi\File comuni\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: Command Service (cmdService) - Unknown owner - C:\WINDOWS\YW5uYWNoaWFyYQ\command.exe (file missing)
O23 - Service: EPSON Printer Status Agent2 (EPSONStatusAgent2) - SEIKO EPSON CORPORATION - C:\Programmi\File comuni\EPSON\EBAPI\SAgent2.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: iPodService - Apple Computer, Inc. - C:\Programmi\iPod\bin\iPodService.exe
O23 - Service: Macromedia Licensing Service - Unknown owner - C:\Programmi\File comuni\Macromedia Shared\Service\Macromedia Licensing.exe
O23 - Service: Network Monitor - Unknown owner - C:\Programmi\Network Monitor\netmon.exe (file missing)