This error is a result of the MCRInstaller not being able to write to the directory from which it is being run.
In order for the MCRInstaller to install, it must first extract several temporary setup files (Setup.exe, Setup.ini, InstMsiW.Exe, and MCRInstaller.msi). If the MCRInstaller is trying to extract these files to a directory where it cannot or may not write files, it will produce the error. Example situations of this would include trying to install from a CD-ROM drive or trying to install from a network folder with read-only permissions.
You can work around this by using the "-d" flag to specify a directory to which the MCRInstaller can extract these temporary setup files.
For example, to extract the temporary setup files to the folder "D:\MCRInstall", issue the following command at the system prompt:
MCRInstaller.exe -d D:\MCRInstall
As a second example, to extract to a user's temporary directory (provided they have a "temp" system variable), use the following command:
MCRInstaller.exe -d %temp%\MCRInstall
