Environment Variable PATH exceeding recommended length I'm installing Oracle 12c on Windows 10 Pro and receiving the error message: 


  "PRVF-3919 : Failed to retrieve value of environment variable "PATH""


I've read through several similar questions and followed recommended procedures:


I'm executing the installation setup as Admin 
I renamed Path to PATH
I counted the existing chars in Path (834, well under the 1023
limit)
I deleted unnecessary Path statements to reduce size
I deleted all entries in Path to start fresh.


All to no avail.  I'm still getting the same error message.  Does anyone have any other ideas or suggestions?

Thank you,
mfc
Thank you all for your answers.  I believe @John Eisbrener had the correct answer.  I placed the installation in a root "C:\Oracle" directory instead of accepting the default User Directory installation.  It installed without issue after that.

Thank you all for your responses.