Hello everyone, I've totally new to this site, so be easy on me!
I am an I.T. employee and I have to prepare computers (all must be running Windows 8.1) for my clients on a daily basis. One of the most annoying and persistant problems I encounter happens when I attempt to change the default theme for all users through Local Group Policy. I always put my .theme file in C:\Windows\Resources\Themes (for organization). I open up GPO and navigate to "User Configuration\Administrative Templates\Control Panel\Personalization" and double-click "Load a specific theme". I then enter the file path, with quotes, "C:\Windows\Resources\Themes\filename.theme" and apply. I then log out and log back in with a brand-new account. After Windows 8.1 finishes setting up the profile, the desktop appears with literally no theme what-so-ever. The desktop and taskbar are coloured completely black. If I go to "Personalization", my theme is listed under "Installed Themes" and I can change it from there with no problem.
I have already tried to install Microsoft's hotfix, "kb980628", but when I run the .msu file I get a message from Standalone Installer:
"Installer encountered an error: 0x80096002"
"The certificate for the signer of the message is invalid or not found."
Am I doing something wrong? This problem drives me crazy because I've gotten it to work before on other computers but I just can't figure it out anymore! Thanks in advance, any insight will be greatly appreciated!