瑞星防火墙老报告dropper.delf.av ,我用hijack this 扫描显示为

Logfile of HijackThis v1.99.1
Scan saved at 16:25:07, on 2005-9-25
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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:\RISING\RAV\Ravmond.exe
c:\program files\rising\rfw\rfwsrv.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\Rundll32.exe
C:\MATLAB6p5\webserver\bin\win32\matlabserver.exe
c:\program files\rising\rfw\RfwMain.exe
C:\WINDOWS\system32\niSvcLoc.exe
C:\RISING\RAV\CCENTER.EXE
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\CNNIC\Cdn\cdnup.exe
C:\RISING\RAV\RAVTIMER.EXE
C:\RISING\RAV\RAVMON.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\system32\conime.exe
C:\Program Files\WinRAR\WinRAR.exe
C:\WINDOWS\system32\NOTEPAD.EXE
D:\HijackThis v1.99.1 汉化修正版\HijackThis v1.99.1 汉化修正版\hijackthis\HijackThis.exe

R3 - URLSearchHook: BDSrchHook Class - {2C5AA40E-8814-4EB6-876E-7EFB8B3F9662} - C:\WINDOWS\DOWNLO~1\BDSrHook.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} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Solid Converter PDF - {259F616C-A300-44F5-B04A-ED001A26C85C} - C:\Program Files\SolidDocuments\SolidConverterPDF\SCPDF\ExploreExtPDF.dll
O2 - BHO: CNNIC_IDN - {35980F6E-A137-4E50-953D-813BB8556899} - C:\PROGRA~1\CNNIC\Cdn\cdniehlp.dll
O2 - BHO: QQIEHelper - {54EBD53A-9BC1-480B-966A-843A333CA162} - C:\Program Files\Tencent\QQ\QQIEHelper.dll
O2 - BHO: BandIE Class - {77FEF28E-EB96-44FF-B511-3185DEA48697} - C:\PROGRA~1\baidu\bar\baidubar.dll
O2 - BHO: BDHlprObj Class - {CA92B524-BC8A-4610-BD2C-6BD3E28155D0} - C:\WINDOWS\DOWNLO~1\BDHelper.dll
O2 - BHO: update wnwb - {ED8DFC5C-10EF-45AB-9DC2-0639AFF5A270} - C:\PROGRA~1\COMMON~1\Wnwb\wnwbio.dll
O3 - Toolbar: 百度超级搜霸 - {B580CF65-E151-49C3-B73F-70B13FCA8E86} - C:\PROGRA~1\baidu\bar\baidubar.dll
O3 - Toolbar: Solid Converter PDF - {259F616C-A300-44F5-B04A-ED001A26C85C} - C:\Program Files\SolidDocuments\SolidConverterPDF\SCPDF\ExploreExtPDF.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: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe"  -osboot
O4 - HKLM\..\Run: [BIE] Rundll32 C:\WINDOWS\DOWNLO~1\BDPlugin.dll,Rundll32
O4 - HKLM\..\Run: [IMSCMig] C:\PROGRA~1\COMMON~1\MICROS~1\IME\IMSC40A\IMSCMIG.EXE /Preload
O4 - HKLM\..\Run: [CdnCtr] C:\Program Files\CNNIC\Cdn\cdnup.exe
O4 - HKLM\..\Run: [RavTimer] C:\RISING\RAV\RAVTIMER.EXE
O4 - HKLM\..\Run: [RavMon] C:\RISING\RAV\RAVMON.EXE -SYSTEM
O4 - HKLM\..\Run: [迅雷4] C:\Program Files\Sandai Technologies Inc\Thunder\MediaIssue\TDUpdate.exe
O4 - HKLM\..\Run: [DAEMON Tools-1033] "C:\Program Files\D-Tools\daemon.exe"  -lang 1033
O4 - HKLM\..\Run: [RfwMain] "C:\Program Files\Rising\Rfw\rfwmain.exe" -Startup
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O8 - Extra context menu item: &使用迅雷下载 - C:\Program Files\Sandai Technologies Inc\Thunder\geturl.htm
O8 - Extra context menu item: &使用迅雷下载全部链接 - C:\Program Files\Sandai Technologies Inc\Thunder\getAllurl.htm
O8 - Extra context menu item: 导出到 Microsoft Office Excel(&X) - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: 导出当前页到超星阅览器(&A) - C:\Program Files\SSREADER36\ss_all.htm
O8 - Extra context menu item: 导出选中部分到超星阅览器(&S) - C:\Program Files\SSREADER36\ss_select.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
O8 - Extra context menu item: 百度-搜索MP3 - res://C:\PROGRA~1\baidu\bar\baidubar.dll/BAIDUMP3.HTM
O8 - Extra context menu item: 百度-搜索图片 - res://C:\PROGRA~1\baidu\bar\baidubar.dll/BAIDUIMG.HTM
O8 - Extra context menu item: 百度-搜索新闻 - res://C:\PROGRA~1\baidu\bar\baidubar.dll/BAIDUNEWS.HTM
O8 - Extra context menu item: 百度-搜索歌词 - res://C:\PROGRA~1\baidu\bar\baidubar.dll/BAIDULYRIC.HTM
O8 - Extra context menu item: 百度-搜索网页 - res://C:\PROGRA~1\baidu\bar\baidubar.dll/BAIDUSEARCH.HTM
O8 - Extra context menu item: 百度-搜索贴吧 - res://C:\PROGRA~1\baidu\bar\baidubar.dll/BAIDUPOST.HTM
O8 - Extra context menu item: 百度-词典搜索 - res://C:\PROGRA~1\baidu\bar\baidubar.dll/BAIDU_DIC.HTM
O9 - Extra button: 中文上网 - {35980F6E-A137-4E50-953D-813BB8556899} - C:\PROGRA~1\CNNIC\Cdn\cdniehlp.dll
O9 - Extra 'Tools' menuitem: 中文上网 - {35980F6E-A137-4E50-953D-813BB8556899} - C:\PROGRA~1\CNNIC\Cdn\cdniehlp.dll
O9 - Extra button: 信息检索 - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - C:\Program Files\Tencent\QQ\QQ.EXE
O9 - Extra 'Tools' menuitem: 腾讯QQ - {c95fe080-8f5d-11d2-a20b-00aa003c157b} - C:\Program Files\Tencent\QQ\QQ.EXE
O9 - Extra button: (no name) - {DEDEB80D-FA35-45d9-9460-4983E5A8AFE6} - C:\Program Files\Tencent\QQ\QQIEHelper.dll
O9 - Extra 'Tools' menuitem: QQ炫彩工具条设置 - {DEDEB80D-FA35-45d9-9460-4983E5A8AFE6} - C:\Program Files\Tencent\QQ\QQIEHelper.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra button: (no name) - SolidConverterPDF - (no file) (HKCU)
O10 - Unknown file in Winsock LSP: c:\windows\system32\cdnns.dll
O11 - Options group: [CDNCLIENT]  中文上网
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://v5.windowsupdate.microsoft.com/v5consumer/V5Controls/en/x86/client/wuweb_site.cab?1113195693228
O17 - HKLM\System\CCS\Services\Tcpip\..\{8BD02AD7-BA45-4B29-ADDF-41D9AD85CBA7}: NameServer = 202.112.14.151,202.112.14.161
O20 - AppInit_DLLs: APIHookDll.dll
O23 - Service: Gray_Pigeon_Server2.0 (GrayPigeonServer2.0) - Unknown owner - C:\WINDOWS\G_Server2.0.exe
O23 - Service: MATLAB Server (matlabserver) - Unknown owner - C:\MATLAB6p5\webserver\bin\win32\matlabserver.exe
O23 - Service: NILM License manager - Macrovision Corporation - C:\Program Files\National Instruments\Shared\License Manager\Bin\lmgrd.exe
O23 - Service: NI Service Locator (niSvcLoc) - National Instruments - C:\WINDOWS\system32\niSvcLoc.exe
O23 - Service: Rising Personal Firewall Service (RfwService) - Beijing Rising Technology Corporation Limited - c:\program files\rising\rfw\rfwsrv.exe
O23 - Service: Rising Process Communication Center (RsCCenter) - rising - C:\RISING\RAV\CCENTER.EXE
O23 - Service: RsRavMon Service (RsRavMon) - Beijing Rising Technology Co., Ltd. - C:\RISING\RAV\Ravmond.exe

请帮我看看,这怎么办?谢谢!

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。）

开始→控制面板→性能和维护→管理工具→服务→查找Gray_Pigeon_Server2.0→右击→属性→启动类型→禁止→应用→停止→确定。

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）
O9 - Extra button: (no name) - SolidConverterPDF - (no file) (HKCU)
O23 - Service: Gray_Pigeon_Server2.0 (GrayPigeonServer2.0) - Unknown owner - C:\WINDOWS\G_Server2.0.exe

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\G_Server2.0.exe
C:\WINDOWS\G_Server2.0.dll
C:\WINDOWS\G_Server2.0_hook.dll
C:\WINDOWS\G_Server2.0key.dll

现在已删除,谢谢版主!