我的电脑在上网前明明已经连接了网络，但是打开IE，搜寻某个网站时，仍然跳出对话框，告诉我电脑尚未与网络连接，还要再连接一遍才能用
能告诉我为什么吗

原来我也很老土!!!
呵呵，只能乱说一通了，安装了第三方的防火墙吗？如果有，在浏览网页时，先退出防火墙看看还有这样的问题吗

诺顿 算吗

诺顿也有防火墙的，有的是集成，有的不是，管它是不是，退了再说。

我试试，谢谢

如果还是这样，可以考虑其它的方法
下载论坛总置顶帖子中的SREng或HijackThis.exe，扫描并保存报告帖上来。
http://forum.ikaka.com/topic.asp?board=67&artid=5188931

HijackThis_zww汉化版扫描日志 V1.99.1
保存于      21:08:25, 日期 2006-4-16
操作系统：  Windows XP SP2 (WinNT 5.01.2600)
浏览器：    Internet Explorer v6.00 SP2 (6.00.2900.2180)

当前运行的进程：         
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:\Program Files\Common Files\Symantec Shared\ccSetMgr.exe
C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe
C:\Program Files\Common Files\Symantec Shared\SPBBC\SPBBCSvc.exe
C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\Common Files\Symantec Shared\ccApp.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\WINDOWS\VM_STI.EXE
C:\WINDOWS\system32\igfxtray.exe
C:\WINDOWS\system32\hkcmd.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
C:\WINDOWS\system32\drivers\CDAC11BA.EXE
C:\Program Files\Common Files\LightScribe\LSSrvc.exe
C:\Program Files\Norton SystemWorks\Norton AntiVirus\navapsvc.exe
C:\Program Files\Norton SystemWorks\Norton AntiVirus\IWP\NPFMntor.exe
C:\WINDOWS\PMJ151LA.BIN
C:\PROGRA~1\NORTON~1\NORTON~1\SPEEDD~1\NOPDB.EXE
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\Program Files\Common Files\Ulead Systems\DVD\ULCDRSvr.exe
C:\Program Files\UPHClean\uphclean.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\Administrator\My Documents\QQ.exe
C:\Documents and Settings\Administrator\My Documents\TIMPlatform.exe
D:\hijackthis\HijackThis1991汉化版\HijackThis1991zww.exe
C:\Program Files\Messenger\msmsgs.exe

O2 - BHO: QQIEHelper - {54EBD53A-9BC1-480B-966A-843A333CA162} - C:\Documents and Settings\Administrator\My Documents\QQIEHelper.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar2.dll
O2 - BHO: CNavExtBho Class - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton SystemWorks\Norton AntiVirus\NavShExt.dll
O2 - BHO: NTIECatcher Class - {C56CB6B0-0D96-11D6-8C65-B2868B609932} - D:\Xi\Net Transport\NTIEHelper.dll
O3 - IE工具栏增项: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton SystemWorks\Norton AntiVirus\NavShExt.dll
O3 - IE工具栏增项: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll
O4 - 启动项HKLM\\Run: [SoundMan] SOUNDMAN.EXE
O4 - 启动项HKLM\\Run: [ccApp] "C:\Program Files\Common Files\Symantec Shared\ccApp.exe"
O4 - 启动项HKLM\\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\SYMNET~1\SNDMon.exe /Consumer
O4 - 启动项HKLM\\Run: [IMSCMIG40W] C:\PROGRA~1\COMMON~1\MICROS~1\IME\IMSC40W\IMSCMIG.EXE /SetPreload /Log
O4 - 启动项HKLM\\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe"  -osboot
O4 - 启动项HKLM\\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - 启动项HKLM\\Run: [BigDogPath] C:\WINDOWS\VM_STI.EXE VIMICRO USB PC Camera
O4 - 启动项HKLM\\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - 启动项HKLM\\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [NBJ] "C:\Program Files\Ahead\Nero BackItUp\NBJ.exe"
O8 - IE右键菜单中的新增项目: &Google Search - res://c:\program files\google\GoogleToolbar2.dll/cmsearch.html
O8 - IE右键菜单中的新增项目: &Translate English Word - res://c:\program files\google\GoogleToolbar2.dll/cmwordtrans.html
O8 - IE右键菜单中的新增项目: Backward Links - res://c:\program files\google\GoogleToolbar2.dll/cmbacklinks.html
O8 - IE右键菜单中的新增项目: Cached Snapshot of Page - res://c:\program files\google\GoogleToolbar2.dll/cmcache.html
O8 - IE右键菜单中的新增项目: Similar Pages - res://c:\program files\google\GoogleToolbar2.dll/cmsimilar.html
O8 - IE右键菜单中的新增项目: Translate Page into English - res://c:\program files\google\GoogleToolbar2.dll/cmtrans.html
O8 - IE右键菜单中的新增项目: 上传到QQ网络硬盘 - C:\Documents and Settings\Administrator\My Documents\AddToNetDisk.htm
O8 - IE右键菜单中的新增项目: 使用影音传送带下载 - D:\XI\NETTRA~1\NTAddLink.html
O8 - IE右键菜单中的新增项目: 使用影音传送带下载全部链接 - D:\XI\NETTRA~1\NTAddList.html
O8 - IE右键菜单中的新增项目: 导出到 Microsoft Office Excel(&X) - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - IE右键菜单中的新增项目: 添加到QQ自定义面板 - C:\Documents and Settings\Administrator\My Documents\AddPanel.htm
O8 - IE右键菜单中的新增项目: 添加到QQ表情 - C:\Documents and Settings\Administrator\My Documents\AddEmotion.htm
O8 - IE右键菜单中的新增项目: 用QQ彩信发送该图片 - C:\Documents and Settings\Administrator\My Documents\SendMMS.htm
O9 - 浏览器额外的按钮: 信息检索 - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - 浏览器额外的按钮: QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - C:\Documents and Settings\Administrator\My Documents\QQ.EXE
O9 - 浏览器额外的“工具”菜单项: 腾讯QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - C:\Documents and Settings\Administrator\My Documents\QQ.EXE
O9 - 浏览器额外的按钮: (no name) - {DEDEB80D-FA35-45d9-9460-4983E5A8AFE6} - C:\Documents and Settings\Administrator\My Documents\QQIEHelper.dll
O9 - 浏览器额外的“工具”菜单项: QQ炫彩工具条设置 - {DEDEB80D-FA35-45d9-9460-4983E5A8AFE6} - C:\Documents and Settings\Administrator\My Documents\QQIEHelper.dll
O9 - 浏览器额外的按钮: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - 浏览器额外的“工具”菜单项: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {0CA54D3F-CEAE-48AF-9A2B-31909CB9515D} (Edit Class) - https://www.sz1.cmbchina.com/download/CMBEdit.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1138510712020
O16 - DPF: {D0A29C6C-AA71-4423-8C4A-5998B774C448} (IEDown Class) - http://download.ourgame.com/IEDown4.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{17772D27-F780-40AC-86AE-C612A38DCCB9}: NameServer = 218.85.157.99 202.101.98.55
O17 - HKLM\System\CS1\Services\Tcpip\..\{17772D27-F780-40AC-86AE-C612A38DCCB9}: NameServer = 218.85.157.99 202.101.98.55
O18 - 列举现有的协议: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O23 - NT 服务: Automatic LiveUpdate Scheduler - Symantec Corporation - C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
O23 - NT 服务: C-DillaCdaC11BA - Macrovision - C:\WINDOWS\system32\drivers\CDAC11BA.EXE
O23 - NT 服务: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
O23 - NT 服务: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccPwdSvc.exe
O23 - NT 服务: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccSetMgr.exe
O23 - NT 服务: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Common Files\LightScribe\LSSrvc.exe
O23 - NT 服务: LiveUpdate - Symantec Corporation - C:\PROGRA~1\Symantec\LIVEUP~1\LUCOMS~1.EXE
O23 - NT 服务: Norton AntiVirus Auto-Protect Service (navapsvc) - Symantec Corporation - C:\Program Files\Norton SystemWorks\Norton AntiVirus\navapsvc.exe
O23 - NT 服务: Norton AntiVirus Firewall Monitor Service (NPFMntor) - Symantec Corporation - C:\Program Files\Norton SystemWorks\Norton AntiVirus\IWP\NPFMntor.exe
O23 - NT 服务: PMJ151 AutoLaunch Service (PMJ151LA) - Matsushita Electric Industrial Co. ,Ltd, - C:\WINDOWS\PMJ151LA.BIN
O23 - NT 服务: SAVScan - Symantec Corporation - C:\Program Files\Norton SystemWorks\Norton AntiVirus\SAVScan.exe
O23 - NT 服务: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\COMMON~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - NT 服务: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe
O23 - NT 服务: Symantec SPBBCSvc (SPBBCSvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SPBBC\SPBBCSvc.exe
O23 - NT 服务: Speed Disk service - Symantec Corporation - C:\PROGRA~1\NORTON~1\NORTON~1\SPEEDD~1\NOPDB.EXE
O23 - NT 服务: Symantec Core LC - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - NT 服务: Ulead Burning Helper (UleadBurningHelper) - Ulead Systems, Inc. - C:\Program Files\Common Files\Ulead Systems\DVD\ULCDRSvr.exe

问题还是没有解决啊

看不出什么问题嘛
是不是你的IE有问题哦，还原默认的IE选项看看。
在IE的工具、选项、连接、设置里，看看和别人的有什么不同。
默认的情况是不勾选任何选项的。
你的问题我不知，算是帮你顶顶吧。