When installing EOC it will also install Orion modules.
When you uninstall EOC via "add/remove programs" or "programs and features", the uninstall process will only uninstall "SolarWinds Enterprise Operations Console." The modules will remain. When you install EOC to a different drive and run the configuration wizard you will receive the error:
"error while executing script- column name or number of supplied values does not match table definition"
Make sure EOC and all of it's associated modules are uninstalled before moving EOC to a different drive on the same system.