SymptomsUpgrade to version 10.4 (from any other version) stalls on Windows 2003.
CauseA process that verifies the server's condition before the upgrade and detects possible issues stalls when checking the free memory.
To resolve the issue, the following actions are required:
1. Download the utility "process explorer" and launch it.
2. Start the upgrade and wait until the "examine_launcher" process spawns a child process called "wmic.exe" with the command line string "OS get FreePhysicalMemory."
3. Kill that child process, and the upgrade will continue.