用Hijackthis扫描如下，哪位高手给诊断一下，非常感谢！
Logfile of HijackThis v1.99.0
Scan saved at 2:17:21, on 2005-9-22
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:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\RISING\RAV\RAVTIMER.EXE
C:\PROGRA~1\RISING\RAV\RAVMON.EXE
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\System32\ctfmon.exe
C:\WINDOWS\system32\rundll32.exe
C:\PROGRAM FILES\RISING\RAV\CCENTER.EXE
C:\PROGRAM FILES\RISING\RAV\Ravmond.exe
C:\PROGRAM FILES\RISING\RAV\RavStub.exe
C:\Program Files\rising\Rav\Rav.exe
D:\Program Files\BitComet\BitComet.exe
D:\Program Files\Thunder Network\Thunder\Thunder.exe
d:\Program Files\Thunder Network\Thunder\MediaIssue\Issue.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\System32\RunDll32.exe
E:\应用软件\HijackThis\HijackThis.exe

R3 - URLSearchHook: 上网助手 - {BB936323-19FA-4521-BA29-ECA6A121BC78} - C:\Program Files\3721\Assist\asbar.dll
O2 - BHO: ThunderIEHelper Class - {0005A87D-D626-4B3A-84F9-1D9571695F55} - C:\WINDOWS\System32\xunleibho_v5.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: IDDTInitObj Class - {15DDE989-CD45-4561-BF99-D22C0D5C2B74} - C:\WINDOWS\Downlo~1\ddtinit.dll
O2 - BHO: Wbho Class - {40E3A34A-3282-41F8-AD2C-051BAB96AD4A} - C:\WINDOWS\System32\Usign.dll
O2 - BHO: QQIEHelper - {54EBD53A-9BC1-480B-966A-843A333CA162} - d:\Program Files\Tencent\QQ\QQIEHelper.dll
O2 - BHO: IeCatch2 Class - {A5366673-E8CA-11D3-9CD9-0090271D075B} - D:\PROGRA~1\FLASHGET\jccatch.dll
O2 - BHO: AssistII - {BB936323-19FA-4521-BA29-ECA6A121BC78} - C:\Program Files\3721\Assist\asbar.dll
O2 - BHO: NTIECatcher Class - {C56CB6B0-0D96-11D6-8C65-B2868B609932} - d:\Program Files\Xi\NetTransport 2\NTIEHelper.dll
O2 - BHO: IE - {D157330A-9EF3-49F8-9A67-4141AC41ADD4} - C:\WINDOWS\DOWNLO~1\CnsHook.dll
O2 - BHO: YiSou - {EF1D17A9-089F-40cc-8D64-7324CDEBA0DB} - C:\PROGRA~1\YiSou\yisoub.dll
O3 - Toolbar: 上网助手 - {BB936323-19FA-4521-BA29-ECA6A121BC78} - C:\Program Files\3721\Assist\asbar.dll
O3 - Toolbar: 电台(&R) - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: 一搜工具条 - {115F6E46-FCBC-41ed-B3B5-3BDDD4AAB5E5} - C:\Program Files\YiSou\yisou.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: [RavTimer] C:\PROGRA~1\RISING\RAV\RAVTIMER.EXE
O4 - HKLM\..\Run: [RavMon] C:\PROGRA~1\RISING\RAV\RAVMON.EXE -SYSTEM
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe"  -osboot
O4 - HKLM\..\Run: [NMGameX_AutoRun] C:\WINDOWS\System32\Rundll32.exe NMGameX.dll,LiveProcess /aa
O4 - HKLM\..\Run: [helper.dll] C:\WINDOWS\system32\rundll32.exe C:\PROGRA~1\3721\helper.dll,Rundll32
O4 - HKLM\..\Run: [assistse] "C:\PROGRA~1\3721\assistse.exe"
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\System32\ctfmon.exe
O4 - Global Startup: 桌面传媒.lnk = ?
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 - D:\Program Files\Thunder Network\Thunder\geturl.htm
O8 - Extra context menu item: &使用迅雷下载全部链接 - D:\Program Files\Thunder Network\Thunder\getAllurl.htm
O8 - Extra context menu item: 使用影音传送带下载 - D:\Program Files\Xi\NetTransport 2\NTAddLink.html
O8 - Extra context menu item: 使用网际快车下载 - D:\Program Files\FlashGet\jc_link.htm
O8 - Extra context menu item: 使用网际快车下载全部链接 - D:\Program Files\FlashGet\jc_all.htm
O9 - Extra button: 手机短信 - {00000000-0000-0001-0001-596BAEDD1289} - http://sms.3721.com/ie/index.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: 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: kele8 - {84920E5F-3788-49cd-A274-E365578DF174} - http://www.kele8.com/ (file missing)
O9 - Extra 'Tools' menuitem: kele8 - {84920E5F-3788-49cd-A274-E365578DF174} - http://www.kele8.com/ (file missing)
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} - d:\Program Files\Tencent\QQ\QQ.EXE
O9 - Extra 'Tools' menuitem: 腾讯QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - d:\Program Files\Tencent\QQ\QQ.EXE
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: (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)
O11 - Options group: [!CNS]  网络实名
O16 - DPF: {33331111-1111-1111-1111-611111193457} - file://c:\ex.cab
O16 - DPF: {33331111-1111-1111-1111-611111193458} - file://c:\ex.cab
O16 - DPF: {33331111-1111-1111-1111-622221193458} - file://c:\ex.cab
O16 - DPF: {43331111-1111-1111-1111-611111195622} - file://c:\ex.cab
O16 - DPF: {64311111-1111-1121-1111-111191113457} - file://c:\eied_s7.cab
O16 - DPF: {C14D003A-DA41-4FEE-8204-62A94EAA29D1} (GLWebAvt Control) - http://bbs.ourgame.com/image/GLWebAvt.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{7EF65ED4-F815-4135-9D73-1D3E25B12526}: NameServer = 69.50.176.196 195.225.176.110
O17 - HKLM\System\CCS\Services\Tcpip\..\{C6D6E82D-B84D-4E36-9AF4-B88054E00D2C}: NameServer = 69.50.176.196,195.225.176.110
O23 - Service: Rising Process Communication Center - rising - C:\PROGRAM FILES\RISING\RAV\CCENTER.EXE
O23 - Service: RsRavMon Service - Beijing Rising Technology Co., Ltd. - C:\PROGRAM FILES\RISING\RAV\Ravmond.exe

请哪位高手诊断一下，谢谢！

http://forum.ikaka.com/topic.asp?board=67&artid=6627966  http://www.17777.com---解决方法1

还有，楼主请修复：
O16 - DPF: {33331111-1111-1111-1111-611111193457} - file://c:\ex.cab
O16 - DPF: {33331111-1111-1111-1111-611111193458} - file://c:\ex.cab
O16 - DPF: {33331111-1111-1111-1111-622221193458} - file://c:\ex.cab
O16 - DPF: {43331111-1111-1111-1111-611111195622} - file://c:\ex.cab
O16 - DPF: {64311111-1111-1121-1111-111191113457} - file://c:\eied_s7.cab
和file missing项

【回复“00漆”的帖子】
重新启动到安全模式（进入安全模式的方法:重新启动电脑, 开机自动检测完后, 按[F8]键(可以一直按到启动菜单出来为止), 选择安全模式(Safe Mode)进入Windows。）

请关闭所有IE界面，重新使用HijackThis扫描一次，选中下面建议修复的项目，让HijackThis修复，修复前请允许HijackThis保留备份。（如果楼主知道是安全的可以不必勾选）
O2 - BHO: Wbho Class - {40E3A34A-3282-41F8-AD2C-051BAB96AD4A} - C:\WINDOWS\System32\Usign.dll.
O16 - DPF: {33331111-1111-1111-1111-611111193457} - file://c:\ex.cab
O16 - DPF: {33331111-1111-1111-1111-611111193458} - file://c:\ex.cab
O16 - DPF: {33331111-1111-1111-1111-622221193458} - file://c:\ex.cab
O16 - DPF: {43331111-1111-1111-1111-611111195622} - file://c:\ex.cab
O16 - DPF: {64311111-1111-1121-1111-111191113457} - file://c:\eied_s7.cab

然后打开我的电脑→再点工具→打开文件夹选项→查看→把隐藏受保护的系统文件（推荐）和隐藏已知文件类型的扩展名的勾去掉→再显示所有文件→找到以下文件并删除：（如果有的话）
C:\WINDOWS\System32\Usign.dll.
c:\ex.cab
c:\eied_s7.cab

非常感谢飞跃迷离老兄！