如果系统现在是IE11，要退回到IE8，那么
①到控制面板里-->已安装的更新-->先卸载IE11
②管理员身份执行以下脚本，例如：blockIE11.cmd /B，重启电脑
@echo off
Echo MICROSOFT TOOL KIT TO DISABLE DELIVERY OF
Echo INTERNET EXPLORER 11
Echo.
Echo Copyright (C) Microsoft Corporation. All rights reserved.
Echo.
set ProductName=Internet Explorer 11
set REGBlockKey=HKLMSOFTWAREMicrosoftInternet ExplorerSetup11.0
set REGBlockValue=DoNotAllowIE11
set RemoteMachine=%1
if ""=="%1" goto Usage
if "/?"=="%1" goto Usage
if /I "/H"=="%1" goto Usage
if /I "/B"=="%1" goto LocalMachine
if /I "/U"=="%1" goto LocalMachine
set RemoteMachineName=%1
set Action=%2
:Parse
if /I "/B" == "%Action%" goto Block
if /I "/U" == "%Action%" goto UnBlock
goto Usage
:Block
Echo Blocking deployment of %ProductName% on %RemoteMachineName%
REG ADD "\%RemoteMachine%\%REGBlockKey%" /v %REGBlockValue% /t REG_DWORD /d 1 /f
goto End
:UnBlock
Echo Unblocking deployment of %ProductName% on %RemoteMachineName%
REG DELETE "\%RemoteMachine%\%REGBlockKey%" /v %REGBlockValue% /f
goto End
:LocalMachine
echo LOCAL!
set Action=%1
set RemoteMachine=.
set RemoteMachineName=the local machine
goto Parse
:Usage
Echo.
Echo This tool can be used to remotely block or unblock the delivery of
Echo %ProductName% via Automatic Updates.
Echo.
Echo ------------------------------------------------------------
Echo Usage:
Echo %0 [machine name] [/B] [/U] [/H]
REM [machine name] [/B|U|H]
Echo B = Block %ProductName% deployment
Echo U = Allow %ProductName% deployment
Echo H = Help
Echo.
Echo To block or unblock installation on the local machine use
Echo period ("." with no quotes) as the machine name
Echo.
Echo Examples:
Echo %0 mymachine /B (blocks delivery on machine "mymachine")
Echo.
Echo %0 /U (unblocks delivery on the local machine)
Echo ------------------------------------------------------------
Echo.
:End
③循环上两步，卸载IE10，以下是IE10脚本，重启电脑
@echo off
Echo MICROSOFT TOOL KIT TO DISABLE DELIVERY OF
Echo MICROSOFT INTERNET EXPLORER 10
Echo.
Echo Copyright (C) Microsoft Corporation. All rights reserved.
Echo.
set ProductName=Internet Explorer 10
set REGBlockKey=HKLMSOFTWAREMicrosoftInternet ExplorerSetup10.0
set REGBlockValue=DoNotAllowIE10
set RemoteMachine=%1
if ""=="%1" goto Usage
if "/?"=="%1" goto Usage
if /I "/H"=="%1" goto Usage
if /I "/B"=="%1" goto LocalMachine
if /I "/U"=="%1" goto LocalMachine
set RemoteMachineName=%1
set Action=%2
:Parse
if /I "/B" == "%Action%" goto Block
if /I "/U" == "%Action%" goto UnBlock
goto Usage
:Block
Echo Blocking deployment of %ProductName% on %RemoteMachineName%
REG ADD "\%RemoteMachine%\%REGBlockKey%" /v %REGBlockValue% /t REG_DWORD /d 1 /f
goto End
:UnBlock
Echo Unblocking deployment of %ProductName% on %RemoteMachineName%
REG DELETE "\%RemoteMachine%\%REGBlockKey%" /v %REGBlockValue% /f
goto End
:LocalMachine
echo LOCAL!
set Action=%1
set RemoteMachine=.
set RemoteMachineName=the local machine
goto Parse
:Usage
Echo.
Echo This tool can be used to remotely block or unblock the delivery of
Echo %ProductName% via Automatic Updates.
Echo.
Echo ------------------------------------------------------------
Echo Usage:
Echo %0 [machine name] [/B] [/U] [/H]
REM [machine name] [/B|U|H]
Echo B = Block %ProductName% deployment
Echo U = Allow %ProductName% deployment
Echo H = Help
Echo.
Echo To block or unblock installation on the local machine use
Echo period ("." with no quotes) as the machine name
Echo.
Echo Examples:
Echo %0 mymachine /B (blocks delivery on machine "mymachine")
Echo.
Echo %0 /U (unblocks delivery on the local machine)
Echo ------------------------------------------------------------
Echo.
:End
④循环上两步，卸载IE9，以下是IE9脚本，重启电脑
@echo off
Echo MICROSOFT TOOL KIT TO DISABLE DELIVERY OF
Echo MICROSOFT INTERNET EXPLORER 9
Echo.
Echo Copyright (C) Microsoft Corporation. All rights reserved.
Echo.
set ProductName=Internet Explorer 9
set REGBlockKey=HKLMSOFTWAREMicrosoftInternet ExplorerSetup9.0
set REGBlockValue=DoNotAllowIE90
set RemoteMachine=%1
if ""=="%1" goto Usage
if "/?"=="%1" goto Usage
if /I "/H"=="%1" goto Usage
if /I "/B"=="%1" goto LocalMachine
if /I "/U"=="%1" goto LocalMachine
set RemoteMachineName=%1
set Action=%2
:Parse
if /I "/B" == "%Action%" goto Block
if /I "/U" == "%Action%" goto UnBlock
goto Usage
:Block
Echo Blocking deployment of %ProductName% on %RemoteMachineName%
REG ADD "\%RemoteMachine%\%REGBlockKey%" /v %REGBlockValue% /t REG_DWORD /d 1 /f
goto End
:UnBlock
Echo Unblocking deployment of %ProductName% on %RemoteMachineName%
REG DELETE "\%RemoteMachine%\%REGBlockKey%" /v %REGBlockValue% /f
goto End
:LocalMachine
echo LOCAL!
set Action=%1
set RemoteMachine=.
set RemoteMachineName=the local machine
goto Parse
:Usage
Echo.
Echo This tool can be used to remotely block or unblock the delivery of
Echo %ProductName% via Automatic Updates.
Echo.
Echo ------------------------------------------------------------
Echo Usage:
Echo %0 [machine name] [/B] [/U] [/H]
REM [machine name] [/B|U|H]
Echo B = Block %ProductName% deployment
Echo U = Allow %ProductName% deployment
Echo H = Help
Echo.
Echo To block or unblock installation on the local machine use
Echo period ("." with no quotes) as the machine name
Echo.
Echo Examples:
Echo %0 mymachine /B (blocks delivery on machine "mymachine")
Echo.
Echo %0 /U (unblocks delivery on the local machine)
Echo ------------------------------------------------------------
Echo.
:End
⑤如果要恢复，逐个执行blockIEXX.cmd /U，重启电脑
⑥安装新版本补丁
安装失败的话，参照：
Method 1:
Run the Windows Update troubleshooter and check.
Open the Windows Update troubleshooter
http://Windows.microsoft.com/en-US/Windows7/Open-the-Windows-Update-troubleshooter
下载：WindowsUpdateDiagnostic.diagcab
Method 2:
Try installing the update in a Clean Boot state.
How to troubleshoot a problem by performing a Clean Boot in Windows Vista or in Windows 7
http://support.microsoft.com/kb/929135
Note: After Clean Boot troubleshooting step, refer to “How to reset the computer to start as usual after troubleshooting with Clean Boot” from the article.
Method 3:
Disable the security software temporarily and try to update.
http://Windows.microsoft.com/en-US/Windows7/Disable-antivirus-software
Note: Antivirus software can help protect the computer against viruses and other security threats. In most cases, you should not disable the antivirus software. If you do have to temporarily disable it to install other software, you should re-enable it as soon as you're done. If you are connected to the Internet or a network during the time the antivirus software is disabled, your computer is vulnerable to attacks.
Refer to the help article:
Troubleshoot problems with installing updates
http://Windows.microsoft.com/en-us/Windows7/Troubleshoot-problems-with-installing-updates
[HKEY_LOCAL_MACHINESOFTWAREMicrosoftInternet ExplorerSetup11.0]
"DoNotOfferIE11AU"=dword:00000001
"REGBlockValue"="DoNotAllowIE11"