Hi,
that's already looking very good. With the exception of "atd", there are no unnecessary services running (everything in square brackets, like "[khelper]" is a kernel task, that you can't stop or start manually). And even "atd" (it's like a complement to cron; used to run one time tasks at some point in the future) sometimes has its uses and probably uses nearly no resources, so you may as well keep it running.
However, this part is strange:
Code:
root 3945 0.0 0.4 6436 2324 ? Ss Mar28 0:02
A process without a name, running as root? That looks quite suspicious. Can you confirm that this isn't simply a display error?