今天用个软件清理注册表以后！一开机就提示如下图！～各位大大教下应该怎么样搞才好啊！

进入注册表
搜索msdc32.dll
找到后全部删除

按你说的做了没有嘛！～

晕，不言的回答完全正确的。这样吧，http://forum.ikaka.com/topic.asp?board=28&artid=6979213第1楼下载HijackThis扫个日志发上来，找找这个启动项。

按他说的做了可是没有文件啊

Logfile of HijackThis v1.99.1
Scan saved at 20:48:42, on 2006-4-14
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:\Program Files\Rising\Rav\CCenter.exe
C:\WINDOWS\System32\svchost.exe
c:\program files\rising\rfw\rfwsrv.exe
C:\WINDOWS\Explorer.EXE
c:\program files\rising\rfw\RfwMain.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\Rising\Rav\RavTask.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Rising\Rav\Ravmond.exe
C:\Program Files\Rising\Rav\RavStub.exe
F:\sl\Thunder.exe
E:\QQ\QQ.exe
E:\QQ\TIMPlatform.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\DOCUME~1\zhou\LOCALS~1\Temp\Rar$EX00.188\HijackThis.exe

F2 - REG:system.ini: UserInit=userinit.exe,
O2 - BHO: ThunderIEHelper - {0005A87D-D626-4B3A-84F9-1D9571695F55} - C:\WINDOWS\system32\xunleibho_v13.dll
O3 - Toolbar: 卡卡上网安全助手 - {DB9ECD4F-FB8F-4311-B3CE-90B976C2707C} - C:\WINDOWS\system32\KakaTool.dll
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: [RfwMain] "C:\Program Files\Rising\Rfw\rfwmain.exe" -Startup
O4 - HKLM\..\Run: [RavTask] "C:\Program Files\Rising\Rav\RavTask.exe" -system
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [Thunder] "F:\sl\ThunderShell.exe" /s
O8 - Extra context menu item: &使用迅雷下载 - F:\sl\geturl.htm
O8 - Extra context menu item: &使用迅雷下载全部链接 - F:\sl\getallurl.htm
O14 - IERESET.INF: START_PAGE_URL=about:blank
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://www1.mydrivers.com/swflash.cab
O16 - DPF: {E4E2F180-CB8B-4DE9-ACBB-DA745D3BA153} (Rising Web Scan Object) - http://download.rising.com.cn/register/pcver/autoupgradepad/pcver2006new/OL2006.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{46FDA0D3-9E62-4B2D-9505-C9F1B4DAD846}: NameServer = 202.103.224.68
O17 - HKLM\System\CCS\Services\Tcpip\..\{8C8E0413-C1E1-4CAC-BF1E-7762B25E9505}: NameServer = 202.103.224.68 202.103.225.68
O23 - Service: Rising Proxy  Service (RfwProxySrv) - Beijing Rising Technology Co., Ltd. - c:\program files\rising\rfw\rfwproxy.exe
O23 - Service: Rising Personal Firewall Service (RfwService) - Beijing Rising Technology Co., Ltd. - c:\program files\rising\rfw\rfwsrv.exe
O23 - Service: Rising Process Communication Center (RsCCenter) - Beijing Rising Technology Co., Ltd. - C:\Program Files\Rising\Rav\CCenter.exe
O23 - Service: RsRavMon Service (RsRavMon) - Beijing Rising Technology Co., Ltd. - C:\Program Files\Rising\Rav\Ravmond.exe

大哥是这吗？

的确没有看到这个启动项啊。这样吧，如果你不怕麻烦的话，参考http://forum.ikaka.com/topic.asp?board=28&artid=7799527导出瑞星防火墙的启动项日志发上来。