疑问求解答
在配置PHP的开发环境，要下载vc15但是下载过程中出现了些问题……求解答求解答~~~百度有如下方式：
安装东西出错的吧，提示你安装时候出现错误代码0x80070641
开始--运行--输入“msiexec /regserver”，再“确定”！
然后在安装M 应该可以解决了！
微软官方给出的意见引用如下：
You may try the follow steps to check if these methods fixes the issue:
Method 1: Check Windows Installer service.
Go to Start > Run > type in services.msc > OK.
The Services window will open, scroll down to Windows Installer and double click on it.
The Properties window will open, on the drop down menu (Start up type) select 'automatic' > OK and close windows.
Reboot PC and hopefully it will work for you.
If issue persist, proceed to next method.
Method 2: Unregister and re-register the Windows Installer
Click Start, click Run, type MSIEXEC /UNREGISTER, and then click OK. Even if you do this correctly, it may look like nothing occurs.
Click Start, click Run, type MSIEXEC /REGSERVER, and then click OK. Even if you do this correctly, it may look like nothing occurs, or you may briefly see an hourglass. After you run this command, the operation is complete.
Try your Windows Installer-based application again.
If issue persist, proceed to next method.
Method 3: Follow the troubleshooting steps from this article:
How to troubleshoot problems that may occur when you install, uninstall, or upgrade a program on a Windows-based computer
http://support.microsoft.com/kb/2438651
Please visit the below mentioned MS links for the resolutions related to error code : 0x80070641
http://support.microsoft.com/default.aspx/kb/818018/
Hope this helps. Let us know if it helps. If the issue persists, we would be glad to assist you further. 你是安装失败2015才用2017顶上的吗，你可以看看电脑是不是缺少KB2999226之类的补丁，或者把服务隐藏一下或许可以解决
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