Thank u very much u maybe right because this particular project im trying to render has more than 10 stills and i didnt pay attention to the resolution i will look into that and i will let you know if reducing the resolution of the still images solves the problem . About the OS installation im trying to install it from a flash drive the I restarted the computer, presed the C key and the installers launches fine but when i choose a clean install it tells me that i can upgrade to this os 🙁 maybe that helps! again thanks