Before Install Compiz On low quality computer or shared graphic proc/memory

Goto->

Menu>Control Center>Desktop Settings//Windows//"tick" Use Compositing

#now Your computer have compositing.There is some application end up black/blank screen without compositing and it dilema install compiz on pc/laptop that only use Graphic Media Accelerator.
#if your computer have high quality component dont bother to do this.just pay your bill to continue.

peace after war.