求助：今天遇到这样一个问题，机器不能上网了。
我是用adsl开路由上网，一直无问题，今天早上却发现不能上网了，具体现象为：
能够用ping命令通，例如ping www.163.com没问题
用浏览器ie却找不到网页。
仔细观察输入地址确定时在浏览器状态栏会出现一个网址：mm.marksix6.com，应该是恶性网站，最终显示找不到网页，地址栏仍为输入的网址。
通过msconfig察看好像无问题，HOSTS文件也正常，运行HijackThis进行扫描结果如下，请各位高手帮忙看看，谢谢。
Logfile of HijackThis v1.99.1
Scan saved at 14:47:52, on 05-7-13
Platform: Windows 98 SE (Win9x 4.10.2222A)
MSIE: Internet Explorer v5.00 (5.00.2614.3500)
Running processes:
C:\WINDOWS\SYSTEM\KERNEL32.DLL
C:\WINDOWS\SYSTEM\MSGSRV32.EXE
C:\WINDOWS\SYSTEM\MPREXE.EXE
C:\PROGRAM FILES\RISING\RAV\CCENTER.EXE
C:\PROGRAM FILES\RISING\RAV\RAVMOND.EXE
C:\PROGRAM FILES\RISING\RAV\RAVMON.EXE
C:\WINDOWS\SYSTEM\mmtask.tsk
C:\WINDOWS\EXPLORER.EXE
C:\WINDOWS\RUNDLL32.EXE
C:\WINDOWS\SYSTEM\INTERNAT.EXE
C:\WINDOWS\TASKMON.EXE
C:\WINDOWS\SYSTEM\SYSTRAY.EXE
C:\WINDOWS\RUNDLL32.EXE
C:\WINDOWS\SYSTEM\IGFXTRAY.EXE
D:\UMSD TOOLS\UMSD.EXE
C:\WINDOWS\RUNDLL32.EXE
C:\WINDOWS\RUNDLL32.EXE
C:\PROGRAM FILES\3721\ASSISTSE.EXE
C:\WINDOWS\SYSTEM\STIMON.EXE
C:\PROGRAM FILES\RISING\RAV\RAVTIMER.EXE
C:\WINDOWS\SYSTEM\DDHELP.EXE
C:\WINDOWS\SYSTEM\WMIEXE.EXE
C:\WINDOWS\DESKTOP\HIJACKTHIS.EXE
O2 - BHO: IeCatch2 Class - {A5366673-E8CA-11D3-9CD9-0090271D075B} - D:\TOOLS\FLASHGET\JCCATCH.DLL
O2 - BHO: 3721中文邮 - {6231D512-E4A4-4DF2-BE62-5B8F0EE348EF} - C:\PROGRAM FILES\3721\CES\CESWEB.DLL
O2 - BHO: AssistII - {BB936323-19FA-4521-BA29-ECA6A121BC78} - C:\PROGRAM FILES\3721\ASSIST\ASBAR.DLL
O2 - BHO: Router Layer - {5EB7CB50-E375-4718-B4C0-9AD12EFA2F84} - C:\WINDOWS\SYSTEM32\ACLAYER.DLL
O3 - Toolbar: FlashGet Bar - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - D:\TOOLS\FLASHGET\FGIEBAR.DLL
O3 - Toolbar: 电台(&R) - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\SYSTEM\MSDXM.OCX
O3 - Toolbar: 上网助手 - {BB936323-19FA-4521-BA29-ECA6A121BC78} - C:\PROGRAM FILES\3721\ASSIST\ASBAR.DLL
O4 - HKLM\..\Run: [internat.exe] internat.exe
O4 - HKLM\..\Run: [ScanRegistry] C:\WINDOWS\scanregw.exe /autorun
O4 - HKLM\..\Run: [TaskMonitor] C:\WINDOWS\taskmon.exe
O4 - HKLM\..\Run: [SystemTray] SysTray.Exe
O4 - HKLM\..\Run: [LoadPowerProfile] Rundll32.exe powrprof.dll,LoadCurrentPwrScheme
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\SYSTEM\igfxtray.exe
O4 - HKLM\..\Run: [PLoader] d:\umsd tools\umsd.exe sys_auto_run D:\UMSD TOOLS
O4 - HKLM\..\Run: [helper.dll] C:\WINDOWS\rundll32.exe C:\PROGRA~1\3721\helper.dll,Rundll32
O4 - HKLM\..\Run: [cesmain.dll] C:\WINDOWS\rundll32.exe C:\PROGRA~1\3721\CES\CMAIL.DLL,Rundll32
O4 - HKLM\..\Run: [assistse] "C:\PROGRAM FILES\3721\ASSISTSE.EXE"
O4 - HKLM\..\Run: [StillImageMonitor] C:\WINDOWS\SYSTEM\STIMON.EXE
O4 - HKLM\..\Run: [cnsmin] msisexec.exe
O4 - HKLM\..\Run: [RavTimer] C:\PROGRA~1\RISING\RAV\RAVTIMER.EXE
O4 - HKLM\..\Run: [RavMon] C:\PROGRA~1\RISING\RAV\RAVMON.EXE -SYSTEM
O4 - HKLM\..\RunServices: [RsCcenter] C:\PROGRA~1\RISING\RAV\CCENTER.EXE
O4 - HKLM\..\RunServices: [RavMond] C:\PROGRA~1\RISING\RAV\RAVMOND.EXE
O4 - HKLM\..\RunServices: [RavMon] C:\PROGRA~1\RISING\RAV\RAVMON.EXE -SYSTEM
O8 - Extra context menu item: 使用网际快车下载 - D:\TOOLS\FLASHGET\jc_link.htm
O8 - Extra context menu item: 使用网际快车下载全部链接 - D:\TOOLS\FLASHGET\jc_all.htm
O9 - Extra button: FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - D:\TOOLS\FLASHGET\FLASHGET.EXE
O9 - Extra 'Tools' menuitem: &FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - D:\TOOLS\FLASHGET\FLASHGET.EXE
O9 - Extra button: 3721中文邮 - {5D73EE86-05F1-49ed-B850-E423120EC329} - http://cmail.3721.com?fb=client (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: 寻宝乐趣多 - {59BC54A2-56B3-44a0-93E5-432D58746E26} - http://hot.3721.com/rd/shop_btn.htm (file missing)
O9 - Extra button: Yahoo 1G电邮 - {507F9113-CD77-4866-BA92-0E86DA3D0B97} - http://cn.mail.yahoo.com/promo/rd1 (file missing)
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: 手机短信 - {00000000-0000-0001-0001-596BAEDD1289} - http://sms.3721.com/ie/index.htm (file missing)
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) - {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)
O10 - Broken Internet access because of LSP provider '_hook.dll' missing
O11 - Options group: [!CNS] 网络实名
O14 - IERESET.INF: SEARCH_PAGE_URL=
O14 - IERESET.INF: START_PAGE_URL=
O16 - DPF: {2422DBFE-14CD-4A59-AC2A-54BADEDD6D53} (wndres Class) - http://download.antusheng.com/download/cnsres.cab
O16 - DPF: {99888952-AC62-437C-AFC6-7B5CF05A7F2F} (IEDown Class) - http://www.ourgame.com/srvcenter/download/IEDown.cab
O16 - DPF: {127698E4-E730-4E5C-A2B1-21490A70C8A1} (CEnroll Class) - http://ca.foxmail.com.cn/xenroll.cab
O16 - DPF: {DA984A6D-508E-11D6-AA49-0050FF3C628D} (Ravonline) - http://download.rising.com.cn/ravkill/rsonline.cab
O16 - DPF: {E75D308D-B903-11D4-BD46-0050BA6E0CA5} (BtecKBase Class) - http://www.oilchem.net/bteck/bteckbasec.dll
O16 - DPF: {F3E92562-1B4D-4BFA-B2D4-E9BCABE3B6A3} (Iesign Control) - https://ebanks.spdb.com.cn/ent/js/iesign.ocx
O16 - DPF: {15DDE989-CD45-4561-BF99-D22C0D5C2B74} - http://image2.sina.com.cn/home/ddtsource/ddt.cab
O16 - DPF: {8D9E0B29-563C-4226-86C1-5FF2AE77E1D2} (AxSubmitControl Class) - https://mybank.icbc.com.cn/icbc/perbank/AxSafeControls.cab
O17 - HKLM\System\CCS\Services\VxD\MSTCP: NameServer = 218.2.135.1,202.102.24.34
