Logfile of HijackThis v1.99.1
Scan saved at 23:18:51, on 2006-5-7
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\Yahoo!\ASSIST~1\YLive.exe
C:\PROGRA~1\Yahoo!\Assistant\yassistse.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\SYSTEM32\RUNDLL32.EXE
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\Common Files\SAND\Network.exe
C:\Program Files\TTPlayer\TTPlayer.exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\Tencent\qq\QQ.exe
C:\Program Files\Tencent\qq\TIMPlatform.exe
C:\Program Files\Thunder Network\Thunder\Thunder.exe
C:\Program Files\Internet Explorer\iexplore.exe
E:\下载\426101200522225654\HijackThis.exe

R3 - URLSearchHook: 雅虎助手 - {406F94F0-504F-4a40-8DFD-58B0666ABEBD} - C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yasbar.dll
O2 - BHO: ThunderIEHelper - {0005A87D-D626-4B3A-84F9-1D9571695F55} - C:\WINDOWS\system32\xunleibho_v14.dll
O2 - BHO: yPhtb - {33BBE430-0E42-4f12-B075-8D21ACB10DCB} - C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yphtb.dll
O2 - BHO: Anti Fish - {38928D50-8A48-44C2-945F-D2F23F771410} - C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yangling.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} - C:\Program Files\Tencent\qq\QQIEHelper.dll
O2 - BHO: YDragSearch - {62EED7C6-9F02-42f9-B634-98E2899E147B} - C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\YDRAGS~1.DLL
O2 - BHO: std software - {6A512BF7-EC78-4e8d-9841-6C02E8FA9838} - C:\WINDOWS\SYSTEM32\stdup.dll
O3 - Toolbar: 雅虎助手 - {406F94F0-504F-4a40-8DFD-58B0666ABEBD} - C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yasbar.dll
O4 - HKLM\..\Run: [IMJPMIG8.1] "C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [PHIME2002ASync] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKLM\..\Run: [PHIME2002A] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /IMEName
O4 - HKLM\..\Run: [YLive.exe] C:\PROGRA~1\Yahoo!\ASSIST~1\YLive.exe
O4 - HKLM\..\Run: [yassistse] "C:\PROGRA~1\Yahoo!\Assistant\yassistse.exe"
O4 - HKLM\..\Run: [KAVPersonal50] "F:\杀毒软件\Kaspersky Anti-Virus Personal\kav.exe" /minimize
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe"  -osboot
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O8 - Extra context menu item: 雅虎搜索 - res://C:\PROGRA~1\Yahoo!\ASSIST~1\Assist\yasbar.dll/246
O17 - HKLM\System\CCS\Services\Tcpip\..\{B5DF8839-E845-49C4-A5A1-0C821E4E43E1}: NameServer = 202.96.128.166,202.96.128.86
O23 - Service: kavsvc - Kaspersky Lab - F:\杀毒软件\Kaspersky Anti-Virus Personal\kavsvc.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Network System (Universal Disk Manager) - COMENET TECHNOLOGY - C:\Program Files\Common Files\SAND\Network.exe

自己顶一下
望斑竹帮帮忙
谢谢

修复：

O2 - BHO: std software - {6A512BF7-EC78-4e8d-9841-6C02E8FA9838} - C:\WINDOWS\SYSTEM32\stdup.dll
O23 - Service: Network System (Universal Disk Manager) - COMENET TECHNOLOGY - C:\Program Files\Common Files\SAND\Network.exe
控制面板-性能与维护-管理工具-服务，找到 Network System →双击→启动类型→禁止→停止→应用→确定。
终止 Network System 这个服务。

删除：
C:\Program Files\Common Files\SAND\

C:\WINDOWS\SYSTEM32\stdup.dll


stdup.dll如不能删除还可参考

http://forum.ikaka.com/topic.asp?board=28&artid=7971417