Hi MS all Support:
This is AHAsoft engineer, Johnson.
User’s environment: Win 7 Pro SP1 32bit。
It occurred muliti-error during install SQL 2012 SP4 express, and ten features (like:Managermetnt tool) are installation failed.
SQL 2012 SP4 express download link:
https://www.microsoft.com/zh-tw/download/details.aspx?id=56042
Installed package name: SQLEXPRADV_x86_CHT.exe, 1.9GB.
Error msg as below:
It occurred be below error:
MS. NET Framework 4.0 installation-failed, because HRESULT -2146697210
It occurred be below error:
C:\Program Files\Microsoft SQL Server\110\Setup Bootstrap\Log\20210706_141619\ConfigurationFile.ini
Error code: 0x800C0006、0x84BB0001
Finally, there are ten features of SQL 2012 SP4 express features are installation failed.
Screen shots( in Chinese ) as below:

And provide the installation log:
112093-summary-unix-i7-20210706-141619.txt
I search the error code & msg, the possible reason is MS. NET Framework 4.0 issue.
But user & I have been removed the NET Framework 4.0, and re-install NET Framework 4.0 & SQL 2021 again, but it was in vain.
Hope MS Support or great experts could provide fix solutions.
Really thank you very much in advanced.