Just tried it with the application I thought might be part of the problem, but everything ran without incident.
I run FSX with everything at max, Ultimate Traffic 2 at 75%, Real world weather using REX2 with its most high definition textures. So, it is conceivable that when I add an additional program such as an ACARS program that also uses simconnect, along with EFB, I may just have pushed thing too far.
As long as it keeps woring like today, it should be fine. If I can figure out exactly what caused it, I'll let you know. Thanks for the fine support.