Bardzo proszę o sprawdzenie loga.
Hijack:

Logfile of HijackThis v1.99.1
Scan saved at 08:27:21, on 2006–04–20
Platform: Windows XP Dodatek SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.5296.0000)

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:\Program Files\Eset\nod32krn.exe
C:\WINDOWS\system32\pctspk.exe
C:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\ATI Technologies\ATI.ACE\cli.exe
C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
C:\Program Files\Roxio\Easy CD Creator 5\DirectCD\DirectCD.exe
C:\Program Files\Eset\nod32kui.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Gadu–Gadu\gg.exe
C:\Program Files\Common Files\Ahead\lib\NMBgMonitor.exe
C:\Program Files\AutoConnect\AutoConnect.exe
C:\PROGRA~1\MOZILL~1\FIREFOX.EXE
C:\WINDOWS\system32\NOTEPAD.EXE
C:\Program Files\Tibia\Tibia.exe
C:\Documents and Settings\Andrzej\Pulpit\HijackThis.exe

R0 – HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
R1 – HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=54729
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
R1 – HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = w3cache.tpnet.pl:8080
R0 – HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Łącza
R3 – URLSearchHook: Search Class – {08C06D61–F1F3–4799–86F8–BE1A89362C85} – C:\PROGRA~1\NEOSTR~1\SEARCH~1.DLL (file missing)
O2 – BHO: AcroIEHlprObj Class – {06849E9F–C8D7–4D59–B87D–784B7D6BE0B3} – C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 – BHO: SSVHelper Class – {761497BB–D6F0–462C–B6EB–D4DAF1D92D43} – C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O4 – HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 – HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 – HKLM\..\Run: [ATICCC] "C:\Program Files\ATI Technologies\ATI.ACE\cli.exe" runtime
O4 – HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
O4 – HKLM\..\Run: [WinampAgent] C:\Program Files\Winamp\winampa.exe
O4 – HKLM\..\Run: [AdaptecDirectCD] "C:\Program Files\Roxio\Easy CD Creator 5\DirectCD\DirectCD.exe"
O4 – HKLM\..\Run: [NeroFilterCheck] C:\Program Files\Common Files\Ahead\Lib\NeroCheck.exe
O4 – HKLM\..\Run: [SpeedTouch USB Diagnostics] "C:\Program Files\Thomson\SpeedTouch USB\Dragdiag.exe" /icon
O4 – HKLM\..\Run: [nod32kui] "C:\Program Files\Eset\nod32kui.exe" /WAITSERVICE
O4 – HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 – HKCU\..\Run: [Gadu–Gadu] "C:\Program Files\Gadu–Gadu\gg.exe" /tray
O4 – HKCU\..\Run: [BgMonitor_{79662E04–7C6C–4d9f–84C7–88D8A56B10AA}] "C:\Program Files\Common Files\Ahead\lib\NMBgMonitor.exe"
O4 – HKCU\..\Run: [AutoConnect] C:\Program Files\AutoConnect\AutoConnect.exe
O8 – Extra context menu item: E&xport to Microsoft Excel – res://C:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O9 – Extra button: (no name) – {08B0E5C0–4FCB–11CF–AAA5–00401C608501} – C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 – Extra 'Tools' menuitem: Sun Java Console – {08B0E5C0–4FCB–11CF–AAA5–00401C608501} – C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll
O9 – Extra button: Research – {92780B25–18CC–41C8–B9BE–3C9C571A8263} – C:\PROGRA~1\MICROS~3\OFFICE11\REFIEBAR.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
O11 – Options group: [INTERNATIONAL] International*
O12 – Plugin for .spop: C:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O16 – DPF: {BB21F850–63F4–4EC9–BF9D–565BD30C9AE9} (ASquaredScanForm Element) – http://www.windowsecurity.com/trojanscan/axscan.cab
O17 – HKLM\System\CCS\Services\Tcpip\..\{0AD3AF31–3D43–40C0–A532–1B5FF6069B82}: NameServer = 80.51.89.5,80.51.89.2
O17 – HKLM\System\CCS\Services\Tcpip\..\{D313F02E–4762–4AD5–B4DC–5D951B4750F6}: NameServer = 80.51.89.5,80.51.89.2
O17 – HKLM\System\CCS\Services\Tcpip\..\{F60BFF47–A8BA–46EF–ACB5–CF6A89461F3C}: NameServer = 194.204.152.34 217.98.63.164
O20 – Winlogon Notify: WgaLogon – C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 – Service: Ati HotKey Poller – ATI Technologies Inc. – C:\WINDOWS\system32\Ati2evxx.exe
O23 – Service: ATI Smart – Unknown owner – C:\WINDOWS\system32\ati2sgag.exe
O23 – Service: NOD32 Kernel Service (NOD32krn) – Eset – C:\Program Files\Eset\nod32krn.exe
O23 – Service: PCTEL Speaker Phone (Pctspk) – PCtel, Inc. – C:\WINDOWS\system32\pctspk.exe
O23 – Service: StarWind iSCSI Service (StarWindService) – Rocket Division Software – C:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe