我也查出了恶意代码Adware.Cdnassist，可是用Hijackthis1.99.1扫描一个log贴看不懂，希望大侠多多帮忙啊.
HijackThis@Qoo的扫描日志  V1.97.7
Scan saved at 20:50:30, on 2005-7-21
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Winamp\Winampa.exe
C:\PROGRA~1\RISING\RAV\RAVTIMER.EXE
C:\PROGRA~1\RISING\RAV\RAVMON.EXE
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\rundll32.exe
C:\PROGRA~1\3721\assistse.exe
E:\天网防火墙\Firewall\pfw.exe
C:\WINDOWS\System32\ctfmon.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\Internet Explorer\iexplore.exe
E:\新建文件夹\新建文件夹\ske\update\61515-HijackThis\HijackThis.exe

R3 - URLSearchHook:
O2 - BHO: (no name) - {35980F6E-A137-4E50-953D-813BB8556899} - (no file)
O2 - BHO: (no name) - {3CD4296F-6CC3-11D9-B888-000C299AA719} - C:\WINDOWS\system32\WebMisc.dll
O2 - BHO: (no name) - {3E422F49-1566-40D3-B43D-077EF739AC32} - C:\WINDOWS\System32\NaviHelper.dll (file missing)
O2 - BHO: QQIEHelper - {54EBD53A-9BC1-480B-966A-843A333CA162} - C:\Program Files\Tencent\QQ\QQIEHelper.dll
O2 - BHO: (no name) - {5EB7CB50-E375-4718-B4C0-9AD12EFA2F84} - C:\WINDOWS\System32\aclayer.dll
O2 - BHO: (no name) - {A5366673-E8CA-11D3-9CD9-0090271D075B} - C:\PROGRA~1\FLASHGET\jccatch.dll
O2 - BHO: (no name) - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O2 - BHO: AssistII - {BB936323-19FA-4521-BA29-ECA6A121BC78} - C:\PROGRA~1\3721\Assist\asbar.dll
O2 - BHO: IE - {D157330A-9EF3-49F8-9A67-4141AC41ADD4} - (no file)
O2 - BHO: YiSou - {EF1D17A9-089F-40cc-8D64-7324CDEBA0DB} - C:\PROGRA~1\YiSou\yisoub.dll
O3 - Toolbar: FlashGet Bar - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - C:\PROGRA~1\FLASHGET\fgiebar.dll
O3 - Toolbar: ????? - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: ????? - {BB936323-19FA-4521-BA29-ECA6A121BC78} - C:\PROGRA~1\3721\Assist\asbar.dll
O3 - Toolbar: ????? - {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: [WinampAgent] "C:\Program Files\Winamp\Winampa.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\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe"  -osboot
O4 - HKLM\..\Run: [CdnCtr] C:\Program Files\CNNIC\Cdn\cdnup.exe
O4 - HKLM\..\Run: [renewup] C:\Program Files\CNNIC\Cdn\cdnrenew.exe
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: [CnsMin] Rundll32.exe C:\WINDOWS\DOWNLO~1\CONFLICT.4\CnsMin.dll,Rundll32
O4 - HKLM\..\Run: [SKYNET Personal FireWall] E:\
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - Startup: NTUSER.DAT
O4 - Startup: NTUSER.DAT.LOG
O4 - Startup: ntuser.ini
O8 - Extra context menu item: &Google Search - res://c:\program files\google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: 使用网际快车下载 - C:\Program Files\FlashGet\jc_link.htm
O8 - Extra context menu item: 使用网际快车下载全部链接 - C:\Program Files\FlashGet\jc_all.htm
O8 - Extra context menu item: 反向链接 - res://c:\program files\google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: 导出到 Microsoft Excel(&x) - res://E:\MICROS~1\Office10\EXCEL.EXE/3000
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
O8 - Extra context menu item: 类似网页 - res://c:\program files\google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: 缓存的网页快照 - res://c:\program files\google\GoogleToolbar1.dll/cmcache.html
O8 - Extra context menu item: 豪杰超级解霸V8实时播放 - C:\Herosoft\HeroV8\MPURLGET.HTM
O9 - Extra button: Related (HKLM)
O9 - Extra 'Tools' menuitem: Show &Related Links (HKLM)
O9 - Extra button: QQ (HKLM)
O9 - Extra button: FlashGet (HKLM)
O9 - Extra 'Tools' menuitem: &FlashGet (HKLM)
O9 - Extra button: Messenger (HKLM)
O9 - Extra 'Tools' menuitem: Windows Messenger (HKLM)
O10 - Unknown file in Winsock LSP: c:\windows\system32\cdnns.dll
O11 - Options group: [!CNS] 
O11 - Options group: [CDNCLIENT] 
O11 - Options group: [TBH] QQ
O14 - IERESET.INF: START_PAGE_URL=about:blank
O16 - DPF: {56336BCB-3D8A-11D6-A00B-0050DA18DE71} - http://software-dl.real.com/035e2dac4e04b9a8a305/netzip/RdxIE601_cn.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - file://C:\Herosoft\HeroV8\DVDSkin\defskin\HTML\swflash.cab
O16 - DPF: {DA984A6D-508E-11D6-AA49-0050FF3C628D} (Ravonline) - http://download.rising.com.cn/QQ/QQkill/rsonline.cab
O16 - DPF: {E4E2F180-CB8B-4DE9-ACBB-DA745D3BA153} (Rising Web Scan Object) - http://download.rising.com.cn/register/pcver/autoupgradepad/Ver2005/OL2005.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{FDCCD02B-8DEB-482B-A223-415E6E375FC4}: NameServer = 202.102.128.68,10.61.100.1