HI David
This is generally down to loading order in windows, which is a bit out of your control, but it can also be conflict with other security applications, slowing loading due to scanning.
Have (or did) you another Anti-Virus installed in this system, if so what was it and how did you get rid of it ?
What other security based software do you have installed (including your firewall
I had Norton, but went to add/remove and deleted it that way. I don't have any other anti viruses installed and I probably have a firewall on windows explorer.
Thanks