XP升级IE8失败，错误信息如下：无法安装windows Internet Explorer，因为其他程序或更新正在等待重启您的计算机。请重启计算机，再次尝试安装此程序。
解决办法，复制下面的代码打txt文件，然后把后缀名改成.bat后执行成功后，再次安装ie8升级补丁。
@echo off
rem fix update garbage value
set Update=HKLM\SOFTWARE\MicroSoft\Update
set Updates=HKLM\SOFTWARE\MicroSoft\Updates
rem set tag.php?name=Windows">Windows\CurrentVersion\WindowsUpdate\AutoUpdate"
echo Cleanning "%Update%"
for /f "tokens=1 delims=" %%a in ('reg query %Update%^|Findstr /i "UpdateExeVolatile"') do (
reg delete %%a /f
)
echo %Update% is cleanned!
echo Cleanning "%Updates%"
for /f "tokens=1 delims=" %%a in ('reg query %Updates%^|Findstr /i "UpdateExeVolatile"') do (
reg delete %%a /f
)
echo %Updates% is cleanned!
echo press any key to exit...
pause>nul