Yup, it is using a lot of resources! Have you installed anything new in recent memory? You had another problem recently. Could it have come from there?
I still don't get why it doesn't appear on google if it's a legit process? Is your system noticeably slower or lots of unusual internet traffic or adverts popping up without any reason?
Oh, BTW, googling 'APEX' is totally useless, about as bad as ACME!
Try Process Explorer, may get some extra info.
Everything that irritates us about others can lead us to an understanding of ourselves. -- Carl Jung
eVGA X58 tri-SLI, i7 930 @ 3.8GHz., Corsair 6GB Dominator, Inno3D GTX470, eVGA260
ASUS P8P67 Pro, i7 2600K @4.60 GHz, 8GB RAM, eVGA GTX 460