Error code 41: Unable to access a critical file/directory
Error code 41 indicates that the installer doesn't have proper access to a critical file or directory.
Solution
Make sure you're not logged in with a restricted account. It is also likely that the file permissions under your current user account have been modified. Select Retry to install the Creative Cloud app again.
And what specifically are you having issues with? You need to be more precise and actually explain what you want, including telling us what errors there are, what you have tried, what your system is.