Reprinted from: http://jingyan.baidu.com/article/a501d80cec07daec630f5e18.html
In Win8, the code 2502 and 2503 errors often occur when installing the MSI installation package. In fact, this error is due to insufficient installation permissions, can be this MSI installation package is not like other EXE installation program, on the installation package click "Right" after the "Run as Administrator" option. So, what should I do when the installer has 2502 or 2503 errors in Win8? Please come and see with me.
Tools/Materials
Method/Step
Put your mouse in the bottom left corner of the Win8 screen, wait for the Win8 Metro interface thumbnail to appear, click the right mouse button, select "Command Prompt (Administrator)" in the popup menu.
Open "Command Prompt (Administrator)"
Note: Please do not use win+r, enter CMD way to open the command line: At this time the permissions are still not enough, install or there will be a problem. System permissions must be used, and system is the overriding administrator privilege.
Find the path of the program you are going to install, for example: The program I want to install is in the others folder on D drive.
Click the path column, copy the path, and then copy the program name.
In command prompt (Administrator), enter the full path and program name of the program you are about to install (note the msiexec/package), such as: I am installing MSXML under the D-Disk others folder
Then press ENTER, the installer will start automatically, at this time, you will not encounter 2502, 2503 error during installation
Win8 Installer 2502, 2503 Error resolution