From what I found, Microsoft says it is a permissions problem.
Make sure that you have administrator rights.
You might also need to modify some sharing folder (what I read did not define it further) so that "Everyone" has modify permissions.
(You might change the rights for all folders on your PC if this is a computer that you alone use. Not the best solution, but a way.)
For more details just Google your error message.
I keep getting this message while trying to install this program
error 1913. setup cannot update file C:\WINDOWS\win.ini.
Verify that the file exists in your system and that you have permission to update it
what do i need to do