The Damn Error Installer Error 2503 and 2502 in Windows 8 when trying to install certain programs that use the “Microsoft installer” or any MSI file and you get a dialog box with the error code 2503 or 2502.
download this reg file Here
Or Create your Own File
Open up Notepad and copy this code into it:- Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\Msi.Package\Shell\runas] “HasLUAShield”=”” [HKEY_CLASSES_ROOT\Msi.Package\shell\runas\Command] @=hex(2):22,00,25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,\ 00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,6d,00,\ 73,00,69,00,65,00,78,00,65,00,63,00,2e,00,65,00,78,00,65,00,22,00,20,00,2f,\ 00,69,00,20,00,22,00,25,00,31,00,22,00,20,00,25,00,2a,00,00,00 Then save as a .reg file, click file, save as “Windows Registry Editor Version 5.00.reg” and save to your desktop, double-click your newly made reg file to merge it with your registry. Now you should have “Run as administrator” back into the context menu for the msi files.
run as administrator and Enjoy Installation🙂