(Solved) 2502/2503 Error When Installing from a .msi File

Sometime, you will get a 2502/2503 error message when trying to install a program from a .msi file.

Here’s how to fix it.

1. Log in as an administrator
2. Navigate to the C:\windows directory in file explorer
3. Find and right-click the temp folder in this directory
4. Select properties from the menu and click the security tab
5. Make a note of the permissions for the following:
   1. All Application Packages
   2. Creator/Owner
   3. Users
   4. Trusted Installers
6. Click the edit button and change the permissions to full control for all of these
7. Click apply and OK/close out of the temp folder properties windows
8. You can now install the program without issue
9. Once the program is installed and working, go back to the temp properties and change the permissions back to what they were before