Install Tortoise-svn.msi, or MSI and other programs in the process reported 2503, 2502 error, mainly the user’s permissions
Open CMD as “Run As administrator”
Then enter msiexec/package “c:\temp\TortoiseSVN-1.14.1.29085-x64-svn-1.14.1.msi” in the inside;
Press Enter, and the installation box will pop up, then click Next to proceed.