Main difference between Chrome and Chromium is that the last one does not have Flash installed. For some this can be a problem, but with this guide it will take you just a minute.
Go to Flash download page
Chromium will be detected as Google Chrome. Click Need Flash Player for a different computer?
Choose Windows 8/Windows Server 2012 and FP 18 for Opera and Chromium – PPAPI
Choose if you want to install free McAfee Security Scan Plus utilityand click yellow Download button
Next you will download flashplayer18pp_ha_install.exe file. Run it and follow instructions on screen.