So call me lazy but I used the MS Web Platform Installer to install WP 3.4/PHP/MySQL and everything works fine except I can not get the automatic update to 3.4.2 to complete. I enter the information for my ftp/web server (I am running my own win 2k8 box) and then get a "could not copy files" error (entire error included below). If I watch the FTP process on the server I see a successful login followed by a STACK OVERFLOW error but no data flow commands (no copy/extract/etc...) and the stack overflow worries me. I have tried logging in as both a specific 'wpupdate' user and 'Administrator' so it should not be a permissions error. I am using IIS 7.5 w/ the FTP add-on in user isolation mode, any clues on what is going wrong or at least where to start tracking this down.
Downloading update from http://wordpress.org/wordpress-3.4.2-partial-0.zip…
Unpacking the update…
Could not copy files.