maybe I got have here late but....I a4gb ram and the worst of it is when I start on the system...it gets hanging there for hours if I leave...so I force restart and on and on untill starts the OS- what could that be? 
if you wanted me to move this post to Hardware I'l but I have read here some points that equals with my problems.
thanks any help. 

"'you shut up!  or I'll bring democracy to your country! "
Cris Galvão aka Softcris  - www.crisgalvao.com
(or softcris, SoftCris)
Rendering since 1997 and
at Renderosity since 1999.
OS Win 8.1     64 bit