I suppose that this problem only happens with Windows 64 bits.
The guilty one is not DAZ installer, even it can have some.
The mess was done by Microsoft that created two Program Files folders, one for 32 and other for 64 bits.
Until now is fine, logical and shouldn't have created any problem.
The problem is that the genius of Microsoft created the redirection of files. Explorer tells you that a file is located in one folder
and the file physically exist in other.
Depending on what you use to locate the file the file can be found or not. Something demoniac!!!

Stupidity also evolves!