NIS 2010 and memory

Hi, two days ago I installed NIS on my Acer Ferrari 1100 notebook because I was so happy with it on my desktop pc.

But what I saw is that NIS is using more memory on my notebook as on my desktop. As I look on my desktop two Symantec Service network processes are usin less than 11Mb of memory. On my notebook one service is using 31MB en another one 12MB

Why is that? Why so difference between them both.