最近电脑运行变慢，用木马克星查出几个可疑文件，但不能删除，手工删除也不行，请高手指教。文件名cdnns.dll，TcpIpDog0.dll，stdup.dll都是在C:WINDOWSsystem32目录下
又出现了一些奇怪现象:
1、我在某网站下个压缩包，内有一WORD文档，我选择保存在本地磁盘，再打开，则显示出错，不能打开，出错信息为文档名或路径无效，并且马上伴随Windows报警说数据错误，需关闭Explorer.exe进程。直接在下载时选择打开则无问题。今天重新开机后打开保存的文档，问题没有了，网络连通以后问题又出现了
2、打开网页的时候偶尔一段时间总出现报告错误，第xx行有错。
3、有个进程Explorer.exe，我直接关闭进程的时候，桌面上什么都没有了。但在前面1中出错信息里关闭时，整个桌面就像刷新了一下一样，再打开进程管理，这个进程依然在。
请高手帮我看一下这是什么病毒啊
realsched.exe,cndup.exe,stfmon.exe,taskmgr.exe是什么进程，是否有问题。

Logfile of HijackThis v1.99.1
Scan saved at 11:29:36, on 2005-11-9
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
E:\Program Files\KAV\KWatch.EXE
C:\WINDOWS\system32\spoolsv.exe
E:\Program Files\KAV\KPfwSvc.EXE
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Maxthon\Maxthon.exe
C:\WINDOWS\explorer.exe
C:\Program Files\广达宽带客户端\广达宽带客户端.exe
E:\工具小软件\HijackThis\HijackThis.exe

O2 - BHO: ThunderIEHelper Class - {0005A87D-D626-4B3A-84F9-1D9571695F55} - C:\WINDOWS\system32\xunleibho_v8.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - E:\Program Files\阅读器\ActiveX\AcroIEHelper.dll
O2 - BHO: IDDTInitObj Class - {15DDE989-CD45-4561-BF99-D22C0D5C2B74} - E:\PROGRA~1\网络工具\UC\UCddt\ddtinit.dll (file missing)
O2 - BHO: i&Bar搜索引擎 - {2E7D3330-EB94-4518-B0FE-E05379A5C1DA} - C:\PROGRA~1\iBar\10002\iBar.dll
O2 - BHO: CNNIC_IDN - {35980F6E-A137-4E50-953D-813BB8556899} - C:\PROGRA~1\CNNIC\Cdn\cdniehlp.dll
O2 - BHO: QQBrowserHelperObject Class - {54EBD53A-9BC1-480B-966A-843A333CA162} - E:\Program Files\网络工具\TENCENT\QQIEHelper.dll
O2 - BHO: Router Layer - {5EB7CB50-E375-4718-B4C0-9AD12EFA2F84} - C:\WINDOWS\System32\aclayer.dll
O2 - BHO: MMSAssist - {6671A431-5C3D-463d-A7CF-5587F9B7E191} - C:\PROGRA~1\MMSASS~1\MMSASS~1.DLL
O2 - BHO: KillObj Class - {66C28884-4E5D-494B-80C9-CAA27528FD6D} - E:\PROGRA~1\网络绻工ぞ具運\UC\UCddt\ddtkillw.ocx (file missing)
O2 - BHO: stdup - {6A512BF7-EC78-4e8d-9841-6C02E8FA9838} - C:\WINDOWS\system32\stdup.dll
O2 - BHO: IE - {D157330A-9EF3-49F8-9A67-4141AC41ADD4} - (no file)
O2 - BHO: WMHlprObj Class - {F5824EFB-728A-4726-A5A5-85A68B20EDC3} - C:\PROGRA~1\CNNIC\Cdn\wmhlpr.dll
O3 - Toolbar: (no name) - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - (no file)
O3 - Toolbar: 新浪点点通 - {F60C7D81-8471-4D40-AAFE-56D318F34C2D} - E:\PROGRA~1\网络工具\UC\UCddt\DDTONG~1.DLL
O3 - Toolbar: i&Bar搜索引擎 - {2E7D3330-EB94-4518-B0FE-E05379A5C1DA} - C:\PROGRA~1\iBar\10002\iBar.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: [NMGameX_AutoRun] C:\WINDOWS\system32\Rundll32.exe nmgamex.dll,LiveProcess /aa
O4 - HKLM\..\Run: [CdnCtr] C:\Program Files\CNNIC\Cdn\cdnup.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe"  -osboot
O4 - HKLM\..\Run: [AGBMonitor] e:\Program Files\Antiy Labs\AGB4\Monitor.exe
O4 - HKLM\..\Run: [MSConfig] C:\WINDOWS\PCHealth\HelpCtr\Binaries\MSConfig.exe /auto
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O8 - Extra context menu item:  >> 彩信发送 << - res://C:\PROGRA~1\MMSASS~1\MMSASS~1.DLL/mms.htm
O8 - Extra context menu item: !搜一搜 - res://C:\WINDOWS\DOWNLO~1\CnsMinEx.dll/1003
O8 - Extra context menu item: &使用迅雷下载 - E:\Program Files\网络工具\迅雷\geturl.htm
O8 - Extra context menu item: &使用迅雷下载全部链接 - E:\Program Files\网络工具\迅雷\getallurl.htm
O8 - Extra context menu item: 使用彩信超级自写发送到手机 - http://mms.sina.com.cn/mmsnews.html
O8 - Extra context menu item: 使用新浪下载助手下载 - E:\PROGRA~1\网络工具\UC\UCddt\sinadl.htm
O8 - Extra context menu item: 发送图片到手机(&M) - http://sms.sina.com.cn/diy/send.html?from=467
O8 - Extra context menu item: 导出到 Microsoft Office Excel(&X) - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: 收藏此页到新浪ViVi - http://vivi.sina.com.cn/collect/click.php?agent=ddt
O8 - Extra context menu item: 新浪搜索 - http://cha.sina.com.cn/ddt.html
O8 - Extra context menu item: 添加到QQ自定义面板 - E:\Program Files\网络工具\TENCENT\AddPanel.htm
O8 - Extra context menu item: 添加到QQ表情 - E:\Program Files\网络工具\TENCENT\AddEmotion.htm
O8 - Extra context menu item: 用QQ彩信发送该图片 - E:\Program Files\网络工具\TENCENT\SendMMS.htm
O8 - Extra context menu item: 访问通用网址 - C:\Program Files\CNNIC\Cdn\cnnic.htm
O9 - Extra button: 手机短信 - {00000000-0000-0001-0001-596BAEDD1289} - http://sms.3721.com/ie/index.htm?pid=206671_1006 (file missing)
O9 - Extra button: 浩方对战平台 - {0A155D3C-68E2-4215-A47A-E800A446447A} - C:\Program Files\浩方对战平台\GameClient.exe (file missing)
O9 - Extra button: 网址大全 - {1FBA04EE-3024-11D2-8F1F-0000F87ABD18} - http://www.coc.cc (file missing)
O9 - Extra button: 中文上网 - {35980F6E-A137-4E50-953D-813BB8556899} - C:\PROGRA~1\CNNIC\Cdn\cdniehlp.dll
O9 - Extra 'Tools' menuitem: 中文上网 - {35980F6E-A137-4E50-953D-813BB8556899} - C:\PROGRA~1\CNNIC\Cdn\cdniehlp.dll
O9 - Extra button: 常用网址 - {36B39F01-7B48-44AD-A165-5849CD8EF562} - C:\WINDOWS\system32\SHDOCVW.DLL
O9 - Extra button: Yahoo 1G电邮 - {507F9113-CD77-4866-BA92-0E86DA3D0B97} - http://cn.mail.yahoo.com/promo/rd1 (file missing)
O9 - Extra button: 寻宝乐趣多 - {59BC54A2-56B3-44a0-93E5-432D58746E26} - http://hot.3721.com/rd/shop_btn.htm (file missing)
O9 - Extra button: 上网助手 - {5D73EE86-05F1-49ed-B850-E423120EC338} - http://assistant.3721.com/index.htm?fb=Cns (file missing)
O9 - Extra button: 番茄花园 - {6096E38F-5AC1-4391-8EC4-75DFA92FB32F} - http://tomatolei.com (file missing)
O9 - Extra button: (no name) - {6671A433-5C3D-463d-A7CF-5587F9B7E191} - C:\PROGRA~1\MMSASS~1\MMSASS~1.DLL
O9 - Extra 'Tools' menuitem: MMSAssist工具条设置 - {6671A433-5C3D-463d-A7CF-5587F9B7E191} - C:\PROGRA~1\MMSASS~1\MMSASS~1.DLL
O9 - Extra button: 信息检索 - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - E:\Program Files\网络工具\TENCENT\QQ.EXE
O9 - Extra 'Tools' menuitem: 腾讯QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - E:\Program Files\网络工具\TENCENT\QQ.EXE
O9 - Extra button: 易趣购物 - {DE607144-AC19-424e-862A-2D70ABDF119A} - http://click2.ad4all.net/url2/urlmanage/url.asp****5 (file missing)
O9 - Extra 'Tools' menuitem: 易趣购物 - {DE607144-AC19-424e-862A-2D70ABDF119A} - http://click2.ad4all.net/url2/urlmanage/url.asp****5 (file missing)
O9 - Extra button: (no name) - {DEDEB80D-FA35-45d9-9460-4983E5A8AFE6} - E:\Program Files\网络工具\TENCENT\QQIEHelper.dll
O9 - Extra 'Tools' menuitem: QQ炫彩工具条设置 - {DEDEB80D-FA35-45d9-9460-4983E5A8AFE6} - E:\Program Files\网络工具\TENCENT\QQIEHelper.dll
O9 - Extra button: 情景聊天 - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - http://cn.rd.yahoo.com/home/messenger/bjk/clientbtn/?http://cn.messenger.yahoo.com/ (file missing)
O9 - Extra button: (no name) - {ECF2E268-F28C-48d2-9AB7-8F69C11CCB71} - http://assistant.3721.com/security1.htm?fb=Cns (file missing)
O9 - Extra 'Tools' menuitem: 修复浏览器 - {ECF2E268-F28C-48d2-9AB7-8F69C11CCB71} - http://assistant.3721.com/security1.htm?fb=Cns (file missing)
O9 - Extra button: 新浪点点通 - {F60C7D81-8471-4D40-AAFE-56D318F34C2D} - E:\PROGRA~1\网络工具\UC\UCddt\DDTONG~1.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
O9 - Extra button: (no name) - {FD00D911-7529-4084-9946-A29F1BDF4FE5} - http://assistant.3721.com/clean1.htm?fb=Cns (file missing)
O9 - Extra 'Tools' menuitem: 清理上网记录 - {FD00D911-7529-4084-9946-A29F1BDF4FE5} - http://assistant.3721.com/clean1.htm?fb=Cns (file missing)
O9 - Extra button: (no name) - {974AD624-EA50-4831-A6C0-3040F6665396} - E:\PROGRA~1\网络工具\UC\UCddt\rssband.dll (HKCU)
O9 - Extra 'Tools' menuitem: 新浪点点通阅读器 - {974AD624-EA50-4831-A6C0-3040F6665396} - E:\PROGRA~1\网络工具\UC\UCddt\rssband.dll (HKCU)
O9 - Extra button: 新浪点点通阅读器 - {F0646DC8-58CD-4C64-8F6B-525043914685} - E:\PROGRA~1\网络工具\UC\UCddt\rssband.dll (HKCU)
O10 - Unknown file in Winsock LSP: c:\windows\system32\cdnns.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\tcpipdog0.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\tcpipdog0.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\tcpipdogr0.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\tcpipdogr0.dll
O11 - Options group: [!CNS]  上网助手-地址栏搜索
O11 - Options group: [CDNCLIENT]  中文上网
O16 - DPF: {C14D003A-DA41-4FEE-8204-62A94EAA29D1} (GLWebAvt Control) - http://bbs.ourgame.com/image/GLWebAvt.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: Kingsoft Personal Firewall Service (KPfwSvc) - Kingsoft Corporation - E:\Program Files\KAV\KPfwSvc.EXE
O23 - Service: Kingsoft Antivirus KWatch Service (KWatchSvc) - Kingsoft Corporation - E:\Program Files\KAV\KWatch.EXE