msi error 2502 and 2503 usually means that the admin user does not have full write access to the folder c:\windows\temp or the SYSTEM users temp directory. It can also mean that the msi is on a mapped drive where the SYSTEM user does not have access to. So, copy the msi to another folder and try installing from there, or check the permissions on the temp folder.
to get a very detailed log, run the installer from an admin console like this: msiexec /i TortoiseSVN-xxxxx.msi /L*V path\to\logfile.txt -- You received this message because you are subscribed to the Google Groups "TortoiseSVN" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tortoisesvn/049fc16f-6130-4907-87d1-33869d1c350en%40googlegroups.com.
