While trying to perform an in-place upgrade of 7.0.3, you may experience an error:
Unable to perform installation. For assistance please contact support.
The installation logs may also show entries such as:
Error 0x80070659: Failed to perform minor upgrade of MSI package.
Possible permissions related issue when executing the installation packages.
Run the installer with elevated credentials (and/or as administrator).
Check if the affected server has any local security policies for software restrictions, if so add policy to exclude administrators from such restrictions.
1) Uninstall 7.0.2;
2) Reboot the server;
3) Deploy 7.0.3 directly.
If solution 3 fails, you may want to clear all Active Roles related entries from registry under HKLM and reattempt the installation of 7.0.3.