Cause
If you do not log in as an administrator, you may not be able to access folders necessary for the installation.
Solution
Log in using an account with administrator authority and then install the software.
The following uses Windows 10 as an example.
Checking the account (when Windows 10(R) is used)
From the [Control Panel] of your computer, select [User Accounts].
The [User Accounts] dialog box appears. Users with administrator authority will have [Administrator] displayed for the [Group]. If this is not displayed, please log on with another account with administrator authority.