considerably

I recently installed Zone alarm security suite and I am using NAV 2006 along with it.Now it seems that my computer has slowed down considerably and also my net connection(broadband).What is happening? please help me.

ok i very badly need posters for my room. the few free poster sites which i found in google dont have what i need. is there any software which can increase a pictures size without reducing its quality considerably . as for printing theres a place which can do it for me so i don have to print em...