单位上的一台机器能正常连接网络、浏览网页、下载、玩游戏，但是不能够登陆任何的论坛和邮箱。
1、登陆论坛：输入用户名和密码确认后虽然出现类似“登陆成功，欢迎XXX“之类的欢迎页面，但是立马就会跳回论坛为登陆状态；
2、登陆邮箱：拿www.126.com为例，输入用户名和密码确认以后出现非法连接页面。

请帮我分析一下是什么问题，cookie我已经清空过了，并设置了自动“检查网页的较新版本”。

Logfile of HijackThis v1.99.1
Scan saved at 10:41:20, on 2006-6-22
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\PROGRAM FILES\RISING\RAV\Ravmond.exe
C:\PROGRAM FILES\RISING\RAV\RavStub.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\Program Files\Rising\Rav\RavService.exe
C:\Program Files\Rising\Rav\CCENTER.EXE
C:\WINDOWS\system32\config\systemprofile\Application Data\Microsoft\Win32DM\ServUDaemon.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Legend\联想键盘驱动\TGESrvLogon.exe
C:\WINDOWS\System32\conime.exe
C:\WINDOWS\system32\config\systemprofile\Application Data\Microsoft\Win32DM\svchostDAT.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Rising\Rav\RavTimer.exe
C:\WINDOWS\soundman.exe
C:\Program Files\Rising\Rav\RavMon.exe
C:\Program Files\Rising\Rav\RavTray.exe
C:\WINDOWS\System32\winspool32.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
E:\MyIE\MyIE.exe
E:\download\HijackThis.exe

O3 - Toolbar: 电台(&R) - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
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: [ravtimer] C:\Program Files\Rising\Rav\RavTimer.exe
O4 - HKLM\..\Run: [SoundMan] soundman.exe
O4 - HKLM\..\Run: [RavMon] C:\Program Files\Rising\Rav\RavMon.exe -system
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [RavTray] C:\Program Files\Rising\Rav\RavTray.exe
O4 - HKLM\..\Run: [Windows Print Spooler] winspool32.exe
O4 - HKLM\..\RunServices: [Windows Print Spooler] winspool32.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O8 - Extra context menu item: &Download by NetAnts - C:\PROGRA~1\NETANTS\NAGet.htm
O8 - Extra context menu item: Download &All by NetAnts - C:\PROGRA~1\NETANTS\NAGetAll.htm
O8 - Extra context menu item: 上传到QQ网络硬盘 - C:\Program Files\Tencent\qq\AddToNetDisk.htm
O8 - Extra context menu item: 添加到QQ自定义面板 - C:\Program Files\Tencent\qq\AddPanel.htm
O8 - Extra context menu item: 添加到QQ表情 - C:\Program Files\Tencent\qq\AddEmotion.htm
O8 - Extra context menu item: 用QQ彩信发送该图片 - C:\Program Files\Tencent\qq\SendMMS.htm
O9 - Extra button: NetAnts - {57E91B47-F40A-11D1-B792-444553540000} - C:\PROGRA~1\NETANTS\NetAnts.exe
O9 - Extra 'Tools' menuitem: &NetAnts - {57E91B47-F40A-11D1-B792-444553540000} - C:\PROGRA~1\NETANTS\NetAnts.exe
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra button: QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - C:\Program Files\Tencent\QQ\QQ.EXE (file missing)
O9 - Extra 'Tools' menuitem: 腾讯QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - C:\Program Files\Tencent\QQ\QQ.EXE (file missing)
O10 - Broken Internet access because of LSP provider 'c:\windows\system32\cdnns.dll' missing
O14 - IERESET.INF: START_PAGE_URL=http://www.microsoft.com/
O17 - HKLM\System\CCS\Services\Tcpip\..\{1705B9F5-7F0B-45A3-BBE4-220D06D5DF78}: NameServer = 202.98.198.168,202.98.192.68
O17 - HKLM\System\CS1\Services\Tcpip\..\{1705B9F5-7F0B-45A3-BBE4-220D06D5DF78}: NameServer = 202.98.198.168,202.98.192.68
O17 - HKLM\System\CS2\Services\Tcpip\..\{1705B9F5-7F0B-45A3-BBE4-220D06D5DF78}: NameServer = 202.98.198.168,202.98.192.68
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: RavService - Unknown owner - C:\Program Files\Rising\Rav\RavService.exe" /service (file missing)
O23 - Service: Rising Process Communication Center (RsCCenter) - Beijing Rising Technology Co., Ltd. - C:\Program Files\Rising\Rav\CCENTER.EXE
O23 - Service: RsRavMon Service (RsRavMon) - Beijing Rising Technology Co., Ltd. - C:\PROGRAM FILES\RISING\RAV\Ravmond.exe
O23 - Service: Serv-U FTP Server (Serv-U) - Unknown owner - C:\WINDOWS\system32\config\systemprofile\Application Data\Microsoft\Win32DM\ServUDaemon.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe
O23 - Service: svchostDAT - Unknown owner - C:\WINDOWS\system32\config\systemprofile\Application Data\Microsoft\Win32DM\services.exe
O23 - Service: TGE CardReader Mgr Host v2 (TGECardReaderMgrHost.2) - Unknown owner - C:\Program Files\Legend\联想键盘驱动\TGESrvLogon.exe