slow processing time

good evening sir.. i would like to ask why is it my rendering was so
slow especially interior?.. i bought a new laptop core i5.. with 2 gig
ddr3 memory.. i tried rendering exterior.. it work fast though the
resolution is high like 2048 x 1536..it rendered less than 20minutes..
yesterday, i tried rendering interior.. i just add 2 spotlights and
emissive to a lamp shade.. i left it rendering for the whole night..
resolution is 320 x 240.. when i checked it later this morning.. it was
not yet finish.. how did this happened? please please help.. (

Baka nag-sleep.

Please post your settings, baka reflective materials or may mga settings na nasobrahan.

tama si sir bokkins, baka nag sleep ang computer mo kaya ndi nag render ng tuloy tuloy. check mo power settings sir.