开机后桌面图标没有，也没有开始菜单，右键菜单也没有，只能进入任务管理器运行程序。
在网上查资料后，认为是江民命名的“桌面侵入者”，下载专杀后，进安全模式运行“专杀”，提示无病毒。又使用网上提供的手工清除大法后，目前症状为：
进入任务管理器，运行“explorer”，桌面显示，但20秒后又没有了，然后过20s又显示，这样反复5、6次后，又回复到刚开始的状态。
请教高手，不重装系统，怎样解决？

[用户系统信息]Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)

日志文件 Trend Micro HijackThis v 2.0.2
日志保存时间: 9:36:16,2008-3-11
操作系统: Windows XP SP2 (WinNT 5.01.2600)
IE版本: Internet Explorer v6.00 SP2 (6.00.2900.2180)
启动模式: 正常

正在运行的进程:
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\Common Files\Symantec Shared\ccSetMgr.exe
C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\drivers\CDAC11BA.EXE
C:\Program Files\Symantec AntiVirus\DefWatch.exe
C:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\Symantec AntiVirus\Rtvscan.exe
C:\Program Files\Common Files\Symantec Shared\ccApp.exe
C:\PROGRA~1\SYMANT~1\VPTray.exe
C:\Program Files\Adobe\Acrobat 7.0\Distillr\Acrotray.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\WINDOWS\system32\taskmgr.exe
I:\hijackthis.exe
C:\DOCUME~1\user\LOCALS~1\Temp\nsr9.tmp\hijackthis.exe

O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: AcroIEToolbarHelper Class - {AE7CD045-E861-484f-8273-0445EE161910} - C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll
O2 - BHO: NavigatMon Class - {B69F34DD-F0F9-42DC-9EDD-957187DA688D} - C:\Program Files\360safe\safemon\safemon.dll
O2 - BHO: (未命名) - {DC2AA6BA-948C-4742-BC9C-D4A3DBC0E9A9} - C:\WINDOWS\system32\pmkhi.dll
O2 - BHO: (未命名) - {F501C2AB-834A-4B9D-A86B-A1EADA760B00} - C:\WINDOWS\system32\mljjkll.dll
O3 - IE 工具栏: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Common Files\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [vptray] C:\PROGRA~1\SYMANT~1\VPTray.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [Acrobat Assistant 7.0] "C:\Program Files\Adobe\Acrobat 7.0\Distillr\Acrotray.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\Ringz Studio\Storm Codec\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKUS\S-1-5-19\..\Run: [ctfmon.exe] C:\WINDOWS\system32\CTFMON.EXE (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [ctfmon.exe] C:\WINDOWS\system32\CTFMON.EXE (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\..\Run: [ctfmon.exe] ctfmon.exe (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [ctfmon.exe] ctfmon.exe (User 'Default user')
O4 - Startup: Adobe Gamma.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Startup: 腾讯QQ.lnk = C:\Program Files\Tencent\QQ\QQ.exe
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Adobe Acrobat Speed Launcher.lnk = ?SystemRoot%\Installer\{AC76BA86-2052-0000-7760-100000000002}\SC_Acrobat.exe
O4 - Global Startup: TurboNote.lnk = C:\Program Files\TurboNote\tbnote.exe
O8 - 扩展右键菜单项: 使用迅雷下载 - C:\Program Files\Thunder Network\Thunder\geturl.htm
O8 - 扩展右键菜单项: 使用迅雷下载全部链接 - C:\Program Files\Thunder Network\Thunder\getAllurl.htm
O8 - 扩展右键菜单项: 导出到 Microsoft Office Excel(&X) - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - 扩展右键菜单项: 添加到QQ表情 - C:\Program Files\Tencent\QQ\AddEmotion.htm
O8 - 扩展右键菜单项: 转换为 Adobe PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - 扩展右键菜单项: 转换为现有 PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - 扩展右键菜单项: 转换选定的链接为 Adobe PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - 扩展右键菜单项: 转换选定的链接为现有 PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppendSelLinks.html
O8 - 扩展右键菜单项: 转换选项为 Adobe PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - 扩展右键菜单项: 转换选项为现有 PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - 扩展右键菜单项: 转换链接目标为 Adobe PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - 扩展右键菜单项: 转换链接目标为现有 PDF - res://C:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O9 - 额外的按钮: 信息检索 - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O16 - DPF: {8D9E0B29-563C-4226-86C1-5FF2AE77E1D2} (AxSubmitControl Class) - https://mybank.icbc.com.cn/icbc/perbank/AxSafeControls.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{31DDE653-8C71-4469-B598-706D435B0BBB}: NameServer = 168.126.63.1,202.96.209.133
O17 - HKLM\System\CS1\Services\Tcpip\..\{31DDE653-8C71-4469-B598-706D435B0BBB}: NameServer = 168.126.63.1,202.96.209.133
O17 - HKLM\System\CS2\Services\Tcpip\..\{31DDE653-8C71-4469-B598-706D435B0BBB}: NameServer = 168.126.63.1,202.96.209.133
O20 - Winlogon Notify: mljjkll - C:\WINDOWS\SYSTEM32\mljjkll.dll
O23 - NT 服务:  Adobe LM Service - Adobe Systems - C:\Program Files\Common Files\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - NT 服务:  C-DillaCdaC11BA - Macrovision - C:\WINDOWS\system32\drivers\CDAC11BA.EXE
O23 - NT 服务:  Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
O23 - NT 服务:  Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccPwdSvc.exe
O23 - NT 服务:  Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccSetMgr.exe
O23 - NT 服务:  Symantec AntiVirus Definition Watcher (DefWatch) - Symantec Corporation - C:\Program Files\Symantec AntiVirus\DefWatch.exe
O23 - NT 服务:  InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - NT 服务:  iPodService - Apple Computer, Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - NT 服务:  NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - NT 服务:  SAVRoam (SavRoam) - symantec - C:\Program Files\Symantec AntiVirus\SavRoam.exe
O23 - NT 服务:  Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe
O23 - NT 服务:  SolidWorks Licensing Service - SolidWorks - C:\Program Files\Common Files\SolidWorks Shared\Service\SolidWorksLicensing.exe
O23 - NT 服务:  Symantec SPBBCSvc (SPBBCSvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SPBBC\SPBBCSvc.exe
O23 - NT 服务:  Symantec AntiVirus - Symantec Corporation - C:\Program Files\Symantec AntiVirus\Rtvscan.exe

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文件结束 - 7199 字节         

对了，忘记说，进程中没有“explorer.exe”，运行后桌面就出来了，但20s后自动退出。又会运行，这样5、6次。