Netbook Problem

i purchased a hp netbook 1030-tu
it came bundled in with a windows starter pack
i formatted the computer and installed windows ultimate

the problem that arised are :
computer freezing very often
cant play videos as the video will freeze
at times it will freeze and will need to be restarted

the specs are
1.66 intel atom processor
dual core
1 gb ddr3 ram

250 gb harddisk

all i want to know is whether this netbook has the potential to run windows ultimate or maybe windows enterprise

because i would not want to have a starter OS ..because it sucks on all levels

all i wanted to know is if ,my netbook meets the requirements set …why does it not work as it ought to ??