When I open a new window, the spinner does not stop, or the window open

Question

I have a MBP 3 yrs. old, running Snow Lep. When I open a new window, the spinner in the address bar spins and window does not open unless I click on the X and stop the spinner. Some times this doesn't work either. It just hangs up trying to open the next window.

Answer 1

The given are very little details about your problem so please elaborate. 
2. on each page load you have to verify whether the session variable. if "IsLoggedIn" exists and its value is "true" then you can show the requested page otherwise redirect to login page.
if(Session["IsLoggedIn"] == null || Session["IsLoggedIn"] != "true")
Response.Redirect("login.aspx");
Better way: use a master page. In the load_page event, check the session. Thus, you wouldn't need to write the method to check in every page, just in the master page.
Noam B.
Do not Forget to Vote as Answer/Helpful, please. It encourages us to help you...
Masterpage is a better idea.
But The login page shouldn't use MasterPage OR need to have logic to check before redirecting to login page if you are already in Login page.
Otherwise you will get into Recursive Redirection error.
hope this helps.