KB486156: Windows MicroStrategy Upgrade Installation is Aborted - Encodings for Database "postgres" Do Not Match: old "WIN1252", new "UTF8"

Issue:
In Strategy ONE Update 11, windows upgrade installation is aborted and install.log logs the following error:
encodings for database "postgres" do not match: old "WIN1252", new "UTF 8"
Failure, exiting
install.log

Windows Upgrade Install Wizard

Root Cause:

1. System locale is changed prior to upgrade install
2. System encoding is different that WIN1252

Workaround:

1. Set the display language to English:
   
• Launch Windows and search for Language Setting. In Windows display language, choose English (United States) from the drop-down.
2. Change system locale to English:
   
• Launch Windows and search for Language Setting. Choose Administrative Language Settings > Language for non-Unicode programs > Change system locale. In Current system locale, choose English (United States) from the drop-down.
3. Reboot the machine.
4. Re-launch upgrade installation.