Logfile of HijackThis v1.99.1
Scan saved at 16:51:20, on 2006-8-18
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\csrss.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:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\Explorer.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\System32\alg.exe
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\WINLOGON.EXE
C:\WINDOWS\system32\cmd.exe
C:\WINDOWS\system32\conime.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\conime.exe
C:\WINDOWS\system32\conime.exe
C:\Program Files\Windows Media Player\wmplayer.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Documents and Settings\Administrator\桌面\ha_hijackthis_1991\HijackThis.exe

R3 - Default URLSearchHook is missing
F2 - REG:system.ini: Shell=Explorer.exe 1
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\Userinit.exe
O2 - BHO: ThunderIEHelper Class - {0005A87D-D626-4B3A-84F9-1D9571695F55} - C:\WINDOWS\system32\xunleibho_v8.dll
O2 - BHO: MonitorURL Class - {08A312BB-5409-49FC-9347-54BB7D069AC6} - C:\PROGRA~1\DESKAD~1\deskipn.dll
O2 - BHO: 雅虎助手 - {406F94F0-504F-4a40-8DFD-58B0666ABEBD} - C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yasbar.dll
O2 - BHO: QQIEHelper - {54EBD53A-9BC1-480B-966A-843A333CA162} - D:\新建文件夹\QQIEHelper.dll
O2 - BHO: BHelper Class - {F2E37336-BFDB-409B-8D0E-6F013C438B20} - C:\WINDOWS\system32\1eco7d90.dll
O3 - Toolbar: 雅虎助手 - {406F94F0-504F-4a40-8DFD-58B0666ABEBD} - C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yasbar.dll
O3 - Toolbar: BitComet工具栏 - {3F1ABCDB-A875-46c1-8345-B72A4567E486} - E:\BitComet\BitCometBar\BitCometBar0.6.dll (file missing)
O4 - HKLM\..\Run: [IMJPMIG8.1] "C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [PHIME2002A] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /IMEName
O4 - HKLM\..\Run: [PHIME2002ASync] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [IMSCMig] C:\PROGRA~1\COMMON~1\MICROS~1\IME\IMSC40A\IMSCMIG.EXE /Preload
O4 - HKLM\..\Run: [Torjan Program] C:\WINDOWS\WINLOGON.EXE
O4 - HKLM\..\Run: [intranet] C:\WINDOWS\system32\intranet.exe
O4 - HKLM\..\Run: [wdfmgr32] C:\WINDOWS\system32\wdfmgr32.exe
O4 - HKLM\..\Run: [Desktop] C:\WINDOWS\system32\rundll32.exe "C:\Program Files\DeskAdTop\Run.dll" ,Rundll
O4 - HKLM\..\RunServices: [Torjan Program] C:\WINDOWS\WINLOGON.EXE
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - Startup: 腾讯QQ.lnk = ?
O4 - Global Startup: IE-Bar.lnk = C:\Program Files\Common Files\IE-Bar\iebar.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O6 - HKLM\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O8 - Extra context menu item: &使用迅雷下载 - C:\Program Files\Thunder Network\Thunder\geturl.htm
O8 - Extra context menu item: &使用迅雷下载全部链接 - C:\Program Files\Thunder Network\Thunder\getAllurl.htm
O8 - Extra context menu item: 上传到QQ网络硬盘 - D:\新建文件夹\AddToNetDisk.htm
O8 - Extra context menu item: 导出到 Microsoft Office Excel(&X) - res://D:\PROGRA~1\MICROS~1\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: 添加到QQ自定义面板 - D:\新建文件夹\AddPanel.htm
O8 - Extra context menu item: 添加到QQ表情 - D:\新建文件夹\AddEmotion.htm
O8 - Extra context menu item: 用QQ彩信发送该图片 - D:\新建文件夹\SendMMS.htm
O8 - Extra context menu item: 雅虎搜索 - res://C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yasbar.dll/246
O9 - Extra button: 信息检索 - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - D:\PROGRA~1\MICROS~1\OFFICE11\REFIEBAR.DLL
O9 - Extra button: QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - D:\新建文件夹\QQ.EXE
O9 - Extra 'Tools' menuitem: 腾讯QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - D:\新建文件夹\QQ.EXE
O9 - Extra button: (no name) - {DEDEB80D-FA35-45d9-9460-4983E5A8AFE6} - D:\新建文件夹\QQIEHelper.dll
O9 - Extra 'Tools' menuitem: QQ炫彩工具条设置 - {DEDEB80D-FA35-45d9-9460-4983E5A8AFE6} - D:\新建文件夹\QQIEHelper.dll
O14 - IERESET.INF: SEARCH_PAGE_URL=
O14 - IERESET.INF: START_PAGE_URL=
O17 - HKLM\System\CCS\Services\Tcpip\..\{46F9895F-4239-4330-8585-9DC8284E1D4A}: NameServer = 202.98.198.168 202.98.192.68
O20 - AppInit_DLLs: KB399952M.LOG
O21 - SSODL: DelayRun - {5A6F2F95-3191-433B-8533-EB0B596A7BAC} - C:\WINDOWS\system\1ecd7d90.dll
O21 - SSODL: DLMon - {590498A3-4131-4D8F-BA4B-36791A0803B1} - C:\WINDOWS\system32\DLMain.dll
O23 - Service: Net Working Service (LoginService) - Unknown owner - C:\WINDOWS\svchost.exe
O23 - Service: Network Logon (NetWorkLogon) - Unknown owner - rundll32.exe (file missing)
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe

给个建议，最好能按照顶置贴的内容，自己尝试学习一下怎么使用HijackThis。
这些其实很简单的。因为很多时候，我并不知道哪些插件对你有用，哪些插件对你无用。