The only times that I have seen this is when there are other issues in the computer that are causing this to be so slow.
It should take less than 1 full second, or even 1/2 second for it to open.
Have you run Ad-aware Programs to find out if you have any type of Spam in the system, or virus'es?
I would do this and see what happens. I would download version 4.21 to see if that makes any difference, you can get it from
HERE.