Respect for the author to support original, such as the need to reprint, please attach the original address: http://blog.csdn.net/libaineu2004/article/details/45533299
Google browser installation failure error code 0xa0430721 causes:
This is because when we uninstalled the last version, we did not delete clean. Then they reinstalled the Google browser. So that’s the problem.
 
1, delete the old configuration folder, such as
WinXP system:
C:\Documents and Settings\XXX\Local Settings\Application Data\Google(Note: The red part is your computer name)
Windows 7/Win10 system:
C:\Users\XXX\AppData\Local\Google
2. Thoroughly clean the registry and delete relevant chrome files:
Copy the content in the http://www.google.com/support/chrome/bin/resource/remove.txt to notepad, save as. Reg file, double-click on the run!
I can’t access Google websites, so I post the removed. TXT text as follows:

Windows Registry Editor Version 5.00
; WARNING, this file will remove Google Chrome registry entries  
; from your Windows Registry. Consider backing up your registry before
; using this file: http://support.microsoft.com/kb/322756
; To run this file, save it as 'remove.reg' on your desktop and double-click it.
[-HKEY_LOCAL_MACHINE\SOFTWARE\Classes\ChromeHTML] 
[-HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\chrome.exe] 
[HKEY_LOCAL_MACHINE\SOFTWARE\RegisteredApplications]
"Chrome"=-
[-HKEY_CURRENT_USER\SOFTWARE\Classes\ChromeHTML] 
[-HKEY_CURRENT_USER\SOFTWARE\Clients\StartMenuInternet\chrome.exe] 
[HKEY_CURRENT_USER\SOFTWARE\RegisteredApplications]
"Chrome"=-
[-HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\Chrome]
[-HKEY_CURRENT_USER\Software\Google\Update\Clients\{8A69D345-D564-463c-AFF1-A69D9E530F96}]
[-HKEY_CURRENT_USER\Software\Google\Update\ClientState\{8A69D345-D564-463c-AFF1-A69D9E530F96}]
[-HKEY_CURRENT_USER\Software\Google\Update\Clients\{00058422-BABE-4310-9B8B-B8DEB5D0B68A}]
[-HKEY_CURRENT_USER\Software\Google\Update\ClientState\{00058422-BABE-4310-9B8B-B8DEB5D0B68A}]
[-HKEY_LOCAL_MACHINE\SOFTWARE\Google\Update\ClientStateMedium\{8A69D345-D564-463c-AFF1-A69D9E530F96}]
[-HKEY_LOCAL_MACHINE\SOFTWARE\Google\Update\Clients\{8A69D345-D564-463c-AFF1-A69D9E530F96}]
[-HKEY_LOCAL_MACHINE\SOFTWARE\Google\Update\ClientState\{8A69D345-D564-463c-AFF1-A69D9E530F96}]
[-HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Google\Update\Clients\{8A69D345-D564-463c-AFF1-A69D9E530F96}]

3. Restart your computer (not necessarily) and install the downloaded offline package Chrome!
4. Success is achieved. (∩_∩)O haha ~
 
★ Note that if the above method is still not feasible, then:
1. Please manually delete C:\Program Files\Google folder.
2. Use RegWorkshop, a third-party registry management tool, to retrieve the keywords “Google” and “Chrome” and delete the associated registry information.
3. Restart the computer and try again.
Respect for the author to support original, such as the need to reprint, please attach the original address: http://blog.csdn.net/libaineu2004/article/details/45533299
 
—
Welcome to this series of articles
Chrome, The Google browser, always has a pop-up message saying “The device was not found”.
Google Chrome: How to turn Flash support on forever
Google browser software installation package download:
https://www.google.cn/intl/zh-CN/chrome/
https://www.google.com/chrome/cleanup-tool/