installation of. NET framework4.0 failed with "fatal error during Installation"

On the Internet a lot of information is said to change what file name and registry What, it is useless, and later found an article, provides the following solutions:

Address: the Microsoft. NET Framework 4.0 installation When a fatal error cannot be installed, thank you.

Workaround:

In other words, renaming the two files below the C drive is OK.

C:\Windows\System32\msvcr100_clr0400.dll
C:\Windows\SysWOW64\msvcr100_clr0400.dll

On top of these two, you can have anything. Instead of the original name.

If the prompt does not have permission, the right-click property can be modified. Everything OK

You can change your name by checking the permissions.

Finally reload. NET framework4.0 success!!

installation of. NET framework4.0 failed with "fatal error during Installation"