Help in Running

Er im kind of new to botting so i dont know how to do stuffs..
so 1st i want to know how to properly run a client..

i downloaded powerbot.. then java jre and jdk..
once finished downloading, i installed both java jre and jdk, then i ran powerbot.. yet nothing is opening.. i kept doing it over and over again.. but
it does not work..

then after awhile when i used the runescape client.. it crashes when i get on the game.. but when i play in the browser.. it works fine..
can anyone help me?

is there something wrong with my java? i mean i downloaded the java program needed to run it right?
..
pls help..
P.S: im on windows 8

Try epicbot it's faster and more effecient thats what I use(d)