IE8升级IE9后，重启电脑怎么还是IE8列。
我是win7 64位的系统，安装IE9提示成功后重启电脑，但是在重启后登录时提示Windows update更新失败，还原到之前的配置。然后登录后还是IE8。大神们有知道是啥问题么~ 求解~~有知道是啥情况的人么~～？
00:00.000: ====================================================================
00:00.125: Started: 2012/11/30 (Y/M/D) 15:14:33.712 (local)
00:00.140: Time Format in this log: MM:ss.mmm (minutes:seconds.milliseconds)
00:00.203: Command line: "D:\360Downloads\IE9-Windows7-x64-chs.exe"
00:00.218: INFO: Setup installer for Internet Explorer: 9.0.8112.16421
00:00.234: INFO: Previous version of Internet Explorer: 8.0.7601.17940
00:00.250: INFO: Checking if iexplore.exe's current version is between 9.0.6001.0...
00:00.265: INFO: ...and 9.1.0.0...
00:00.296: INFO: Maximum version on which to run IEAK branding is: 9.1.0.0...
00:00.312: INFO: iexplore.exe version check success. Install can proceed.
00:00.328: INFO: Trying to extract ID: 7006 (0) as "IE9-neutral.Extracted.cab"
00:00.577: INFO: Trying to extract ID: 7010 (2052) as "ielangpack-CHS.CAB"
00:00.655: INFO: Trying to extract ID: 5006 (0) as "IE9-support.cab"
00:01.310: INFO: Operating System: Windows Workstation: 6.1.7601 (Service Pack 1)
00:01.357: INFO: Windows 7 operating system detected.
00:01.373: INFO: Service pack major: 1
00:01.388: INFO: Service pack minor: 0
00:01.404: INFO: Service pack name:Service Pack 1
00:01.669: INFO: PauseOrResumeAUThread: Successfully paused Automatic Updates.
04:25.717: INFO: The neutral package failed to download.Error: 0x800c0005 (2148270085)
04:25.779: INFO: The neutral pack was not successfully downloaded from the internet. Installation will continue using the extracted package.
04:25.795: INFO: No reboot policy and supplemental files successfully downloaded and extracted for use.
04:25.857: INFO: No reboot logic message NrApiStart(0), lParam=0x00486520 returned 0x00000000.
04:27.011: INFO: No reboot logic message NrApiScan(1), lParam=0x00000001 returned 0x00000000.
04:27.058: INFO: No reboot logic message NrApiStartInstall(4), lParam=0x00000001 returned 0x00000014.
04:27.074: INFO: Installing with the extracted package. C:\Windows\TEMP\IE99689.tmp\IE9-neutral.Extracted.cab
04:27.136: INFO: Launched package installation: C:\Windows\system32\dism.exe /online /add-package /packagepath:C:\Windows\TEMP\IE99689.tmp\IE9-neutral.Extracted.cab /quiet /norestart
04:58.617: INFO: Process exit code 0x00000BC2 (3010)
04:58.664: INFO: Setting registry to check if Internet Explorer is the default browser on first run: SUCCESS.
04:58.726: INFO: Launched package installation: C:\Windows\system32\dism.exe /online /add-package /packagepath:C:\Windows\TEMP\IE99689.tmp\ielangpack-CHS.CAB /quiet /norestart
05:10.629: INFO: Process exit code 0x00000BC2 (3010)
05:10.660: INFO: No reboot logic message NrApiInstallDone(7), lParam=0x00000bc2 returned 0x00000000.
05:10.692: INFO: No reboot logic message NrApiStartFinish(11), lParam=0x00000000 returned 0x00000000.
05:10.770: INFO: No reboot logic message NrApiFinish(12), lParam=0x00000000 returned 0x00000016.
05:10.816: INFO: Checking it the Internet Explorer Optional Component is enabled.
05:16.183: INFO: Disabling active setup.
05:16.261: INFO: Added command to re-enable active setup after install and reboot.
05:16.292: INFO: PauseOrResumeAUThread: Successfully resumed Automatic Updates.
05:16.323: INFO: Setup exit code: 0x00000BC2 (3010) - Installation Succeeded. Reboot required.
05:16.401: INFO: Scheduling upload to IE SQM server: http://sqm.microsoft.com/sqm/ie/sqmserver.dll
05:16.448: INFO: SQM Upload returned 403
05:16.479: INFO: Cleaning up temporary files in: C:\Windows\TEMP\IE99689.tmp
05:16.573: INFO: Unable to remove directory C:\Windows\TEMP\IE99689.tmp, marking for deletion on reboot.
05:16.635: INFO: Rebooting computer...
05:16.713: INFO: Released Internet Explorer Installer Mutex
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