我的电脑中出现了一个不明程序。它在开始的启动菜单中，是名为explorer.exe的应用程序。无法手动删除，正版瑞星2006也检测不出异常。我不知道explorer.exe是什么，对系统有没有危害。请热心人帮助。

请高手帮我看一下。
Logfile of Kaka v2. 0. 0. 8 Scan Module v2. 0. 0. 1
Scan saved at 10:55:09, on 2006-02-24
Platform: Microsoft Windows XP Professional Service Pack 2 (Build 2600)
MSIE: Internet Explorer v6.00 SP2; (6.00.2900.2180 (xpsp_sp2_rtm.040803-2158))


Running processes:
[smss.exe]
CommandLine =

[csrss.exe]
CommandLine = C:\WINDOWS\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,3072,512 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ProfileControl=Off MaxRequestThreads=16

[winlogon.exe]
CommandLine = winlogon.exe

[services.exe]
CommandLine = C:\WINDOWS\system32\services.exe

[lsass.exe]
CommandLine = C:\WINDOWS\system32\lsass.exe

[Ati2evxx.exe]
CommandLine = C:\WINDOWS\system32\Ati2evxx.exe

[svchost.exe]
CommandLine = C:\WINDOWS\system32\svchost -k DcomLaunch

[svchost.exe]
CommandLine = C:\WINDOWS\system32\svchost -k rpcss

[CCenter.exe]
CommandLine = "D:\Program Files\Rising\Rav\CCenter.exe"

[svchost.exe]
CommandLine = C:\WINDOWS\System32\svchost.exe -k netsvcs

[svchost.exe]
CommandLine = C:\WINDOWS\system32\svchost.exe -k NetworkService

[svchost.exe]
CommandLine = C:\WINDOWS\system32\svchost.exe -k LocalService

[RavMonD.exe]
CommandLine = "D:\Program Files\Rising\Rav\Ravmond.exe"

[rfwsrv.exe]
CommandLine = "d:\program files\rising\rfw\rfwsrv.exe"

[spoolsv.exe]
CommandLine = C:\WINDOWS\system32\spoolsv.exe

[RavStub.exe]
CommandLine = "D:\Program Files\Rising\Rav\RavStub.exe" /RAVMOND

[Ati2evxx.exe]
CommandLine = Ati2evxx.exe -Client

[Explorer.EXE]
CommandLine = C:\WINDOWS\Explorer.EXE

[Crypserv.exe]
CommandLine = crypserv.exe

[wdfmgr.exe]
CommandLine = C:\WINDOWS\system32\wdfmgr.exe

[RfwMain.exe]
CommandLine =  -StartUp

[alg.exe]
CommandLine = C:\WINDOWS\System32\alg.exe

[CLI.exe]
CommandLine = "C:\Program Files\ATI Technologies\ATI.ACE\cli.exe" runtime

[RTHDCPL.EXE]
CommandLine = "C:\WINDOWS\RTHDCPL.EXE"

[KBD.EXE]
CommandLine = "C:\HP\KBD\KBD.EXE"

[RavTask.exe]
CommandLine = "D:\PROGRAM FILES\RISING\RAV\RAVTASK.EXE" -SYSTEM

[RavMon.exe]
CommandLine = "D:\Program Files\Rising\Rav\Ravmon.exe" -SYSTEM

[ctfmon.exe]
CommandLine = "C:\WINDOWS\system32\ctfmon.exe"

[msmsgs.exe]
CommandLine = "C:\Program Files\Messenger\msmsgs.exe" /background

[CLI.exe]
CommandLine = "C:\Program Files\ATI Technologies\ATI.ACE\cli.exe" -hide Dashboard

[iexplore.exe]
CommandLine = "C:\Program Files\Internet Explorer\iexplore.exe"

[BitComet.exe]
CommandLine = "D:\Program Files\BitComet\BitComet.exe"

[iexplore.exe]
CommandLine = "C:\Program Files\Internet Explorer\iexplore.exe"

[KkScan.exe]
CommandLine = "D:\Program Files\Rising\KakaToolBar\KkScan.exe"

O3 - Toolbar: 卡卡上网安全助手 - {DB9ECD4F-FB8F-4311-B3CE-90B976C2707C} - C:\WINDOWS\system32\KakaTool.dll
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
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: [ATICCC] "C:\Program Files\ATI Technologies\ATI.ACE\cli.exe" runtime
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [KBD] C:\HP\KBD\KBD.EXE
O4 - HKLM\..\Run: [PS2] C:\WINDOWS\system32\ps2.exe
O4 - HKLM\..\Run: [RavTask] "D:\Program Files\Rising\Rav\RavTask.exe" -system
O4 - HKLM\..\Run: [RfwMain] "D:\Program Files\Rising\Rfw\rfwmain.exe" -Startup
O4 - HKLM\..\Run: [IMSCMig] C:\PROGRA~1\COMMON~1\MICROS~1\IME\IMSC40A\IMSCMIG.EXE /Preload
O4 - HKLM\..\Run: [StormCodec_Helper] "D:\Program Files\Ringz Studio\Storm Codec\StormSet.exe" /S /opti
O4 - Startup: desktop.ini =
O4 - Startup: explorer.exe =
O4 - Global Startup: desktop.ini =
O4 - Global Startup: AutoCAD 启动加速器.lnk = C:\Program Files\Common Files\Autodesk Shared\acstart16.exe
O4 - Global Startup: ATI CATALYST 系统托盘.lnk = C:\Program Files\ATI Technologies\ATI.ACE\CLI.exe
O8 - Extra context menu item: 使用网际快车下载 - D:\PROGRA~1\FLASHGET\jc_link.htm
O8 - Extra context menu item: 使用网际快车下载全部链接 - D:\PROGRA~1\FLASHGET\jc_all.htm
O14 - IERESET.INF: START_PAGE_URL=http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {488A4255-3236-44B3-8F27-FA1AECAA8844} (CEditCtrl Object) - https://img.alipay.com/download/aliedit.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1139806216388
O16 - DPF: {B495C654-5860-45D4-8EAA-5663B9393F33} (OVA Class) - http://go.microsoft.com/fwlink/?linkid=49480
O16 - DPF: {E4E2F180-CB8B-4DE9-ACBB-DA745D3BA153} (Rising Web Scan Object) - http://download.rising.com.cn/register/pcver/autoupgradepad/pcver2006new/OL2006.cab
O16 - DPF: {F138084D-84D7-48CD-BEA8-04772457516E} (VqqSpeedDlProxy Class) - http://218.85.138.27/vqqsdl1009.cab
O16 - DPF: {F58E1CEF-A068-4C15-BA5E-587CAF3EE8C6} (MSN Chat Control 4.5) - http://chat.msn.com/controls/msnchat45.cab
O18 - Filter : application/octet-stream - {1E66F26B-79EE-11D2-8710-00C04F79ED0D} - C:\WINDOWS\system32\mscoree.dll
O18 - Filter : application/x-complus - {1E66F26B-79EE-11D2-8710-00C04F79ED0D} - C:\WINDOWS\system32\mscoree.dll
O18 - Filter : application/x-msdownload - {1E66F26B-79EE-11D2-8710-00C04F79ED0D} - C:\WINDOWS\system32\mscoree.dll
O18 - Protocol: about - {3050F406-98B5-11CF-BB82-00AA00BDCE0B} - C:\WINDOWS\system32\mshtml.dll
O18 - Protocol: cdl - {3dd53d40-7b8b-11D0-b013-00aa0059ce02} - C:\WINDOWS\system32\urlmon.dll
O18 - Protocol: dvd - {12D51199-0DB5-46FE-A120-47A3D7D937CC} - C:\WINDOWS\system32\msvidctl.dll
O18 - Protocol: file - {79eac9e7-baf9-11ce-8c82-00aa004ba90b} - C:\WINDOWS\system32\urlmon.dll
O18 - Protocol: ftp - {79eac9e3-baf9-11ce-8c82-00aa004ba90b} - C:\WINDOWS\system32\urlmon.dll
O18 - Protocol: gopher - {79eac9e4-baf9-11ce-8c82-00aa004ba90b} - C:\WINDOWS\system32\urlmon.dll
O18 - Protocol: http - {79eac9e2-baf9-11ce-8c82-00aa004ba90b} - C:\WINDOWS\system32\urlmon.dll
O18 - Protocol: https - {79eac9e5-baf9-11ce-8c82-00aa004ba90b} - C:\WINDOWS\system32\urlmon.dll
O18 - Protocol: ipp - (no CLSID) - (no file)
O18 - Protocol: its - {9D148291-B9C8-11D0-A4CC-0000F80149F6} - C:\WINDOWS\system32\itss.dll
O18 - Protocol: javascript - {3050F3B2-98B5-11CF-BB82-00AA00BDCE0B} - C:\WINDOWS\system32\mshtml.dll
O18 - Protocol: local - {79eac9e7-baf9-11ce-8c82-00aa004ba90b} - C:\WINDOWS\system32\urlmon.dll
O18 - Protocol: mailto - {3050f3DA-98B5-11CF-BB82-00AA00BDCE0B} - C:\WINDOWS\system32\mshtml.dll
O18 - Protocol: mhtml - {05300401-BCBC-11d0-85E3-00C04FD85AB4} - C:\WINDOWS\system32\inetcomm.dll
O18 - Protocol: mk - {79eac9e6-baf9-11ce-8c82-00aa004ba90b} - C:\WINDOWS\system32\urlmon.dll
O18 - Protocol: ms-its - {9D148291-B9C8-11D0-A4CC-0000F80149F6} - C:\WINDOWS\system32\itss.dll
O18 - Protocol: msdaipp - (no CLSID) - (no file)
O18 - Protocol: mso-offdap - {3D9F03FA-7A94-11D3-BE81-0050048385D1} - C:\PROGRA~1\COMMON~1\MICROS~1\WEBCOM~1\10\OWC10.DLL
O18 - Protocol: mso-offdap11 - {32505114-5902-49B2-880A-1F7738E5A384} - C:\PROGRA~1\COMMON~1\MICROS~1\WEBCOM~1\11\OWC11.DLL
O18 - Protocol: res - {3050F3BC-98B5-11CF-BB82-00AA00BDCE0B} - C:\WINDOWS\system32\mshtml.dll
O18 - Protocol: sysimage - {76E67A63-06E9-11D2-A840-006008059382} - C:\WINDOWS\system32\mshtml.dll
O18 - Protocol: tv - {CBD30858-AF45-11D2-B6D6-00C04FBBDE6E} - C:\WINDOWS\system32\msvidctl.dll
O18 - Protocol: vbscript - {3050F3B2-98B5-11CF-BB82-00AA00BDCE0B} - C:\WINDOWS\system32\mshtml.dll
O18 - Protocol: wia - {13F3EA8B-91D7-4F0A-AD76-D2853AC8BECE} - C:\WINDOWS\system32\wiascr.dll
O20 - Winlogon Notify: AtiExtEvent
O23 - Service: Ati HotKey Poller (Ati HotKey Poller) - ATI Technologies Inc. - C:\WINDOWS\system32\ati2evxx.exe
O23 - Service: ATI Smart (ATI Smart) -  - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: Autodesk Licensing Service (Autodesk Licensing Service) - Autodesk, Inc. - "C:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe"
O23 - Service: Crypkey License (Crypkey License) - Kenonic Controls Ltd. - crypserv.exe
O23 - Service: Human Interface Device Access (HidServ) -  - C:\WINDOWS\system32\svchost.exe -k netsvcs
O23 - Service: Rising Proxy  Service (RfwProxySrv) - Beijing Rising Technology Co., Ltd. - d:\program files\rising\rfw\rfwproxy.exe
O23 - Service: Rising Personal Firewall Service (RfwService) - Beijing Rising Technology Co., Ltd. - d:\program files\rising\rfw\rfwsrv.exe
O23 - Service: Rising Process Communication Center (RsCCenter) - Beijing Rising Technology Co., Ltd. - "D:\Program Files\Rising\Rav\CCenter.exe"
O23 - Service: RsRavMon Service (RsRavMon) - Beijing Rising Technology Co., Ltd. - "D:\Program Files\Rising\Rav\Ravmond.exe"