This error shows that there is an issue with preparing the target directory for installation. This can be due to a number of reasons, including user permission issues that may be preventing read/write access to the installation directory.
This will ensure that you're able to install games to protected folders on your computer.
Trying to install your game on another hard drive may resolve this issue for you.
You can change the download location after you click Install on any game in your Library by clicking Browse:
Let us know how we can help you.