Q: Since I upgraded to Lion MACOSX.10.7.3 my toolbar does not fully load and my Airport settings change and do not allow me access to the internet even though I lock my preferences. I'm going crazy trying to fix this problem.

Since upgrading to Lion OSX.10.7.3 I am having network problems. It changes my preferences even though I lock them. I cannot connect to the internet most of the time. How do i lock my preferences so the program will not change them? When it changes them it also freezes the curser where it won't work. I'm going crazy trying to fix this problem. Please help me!