I just lucked upon the solution, I guess.
Like y'all, I came to the forum actually looking for a solution and to see if others were having the same +1 minute delay problem, following the program update to build 4.5.561.
I took one last attempt at repairs, when I just clicked on the Proxy Settings button, just to check.
(Note: This proxy setting can also be changed in the path: Control Panel-->Add-Remove Programs-->Avast-->Repair>Proxy Settings). Make sure you are logged on as "administrator" on WinXP when doing this settings change.
This is where I changed mine back to "Direct connection to internet", as I have a Cable Broadband connection.
I saw that this eliminated the delay problem, and discovered this only minutes before my previous post (first post ever on the Avast forums).
I feel great, that I could help other Avast users with the problem, as well as myself.
That's what these forums are all about,, helping others. I just stumbled on it by luck.
I emailed the Avast support team, in hopes that they address this problem and let all other Avast users be aware of the problem and the solution/workaround. (Or at least have them get back to me with a gratuity of 30% of all annual sales,, lol,, just joking).
Thanks for the "Thanks" & A Best 2005 to you all,
Acco