Cortona seems to always pop up no matter what you do. Also your problem is you're only running 2 GB of ram, most say the minimum you should have is 4GB any way. Are you running 64 bit or 32bit?
64, becase i add 2gb of ram tomorrow.
But do you think of chrome i use big memory anyway?
No every thing looks normal, and chrome mainly uses a lot or processing over ram. I just think your issue is you're only using 2gb period, and on a 64bit OS. But once you have upgraded it you should be fine.