Here is additional information since you didn't fully understand my prior post regarding this problem.
I purchased PhotoShow Deluxe 4 directly from SimpleStar some four years ago. As of last week, when the package starts, it hangs up in an infinite loop - consuming 100% of the CPU on a single core system, and 52% of the CPU on a dual core system. I don't see how you can state my theory is flawed, since the problem is occuring on multiple systems when the program was fully operational just a week prior. The fact is, when the computer running photoshow is disconnected from the Internet, it comes up and works just fine. When the internet is connected and you start photoshow, the splash screen appears, no buttons work, the help does not work, preferences does not work, and you can't terminate the program either using the upper right corner X. There is no reaction to any buttons pressed in the program - it is entirely dead. This is the problem in its entirety. There are no error messages. It just no longer operates after the splash screen appears, unless you disconnect from the Internet before starting the program.
So regardless of what the program is doing with the Internet during startup, whether it is looking for a non-existant update, or checking a serial number, or whatever it might be doing, the fact is, whatever it has been using in the past on the Internet, is no longer there or is returning data that is not what was expected, and flawed error logic is causing the program to go into an infinite loop. Yet disconnecting from the internet is bypass the startup access to the net and is thereby bypassing the logic that is ending up getting into the loop.
The software downloaded to a differnt computer for testing, was the original version of PhotoShow Deluxe. I retained the original software package in order to reload it in the future if necessary.
I have not attempted to contact Roxio technical support after reading all of the posts in this forum regarding experiences with their tech support. Most people have stated that tech support either did not respond to questions or was useless. And considering this is a legacy product manufactured by a company they acquired, calling tech support will be a waste of time. This is not a simple configuration or operation problem. This problem has more than likely occured because of an obsure change at Roxio which may be as simple as not renewing an old Domain name. This may not have been a deliberate action on Roxio's part at all but a fall out of something that changed online that resulted in Photoshow executing flawed error logic that was never executed in the past.
The primary purpose of my post was to let people know that might run into the same problem, that there is a way around the problem if they disconnect from the Internet.
BTW - when you ask if the program is looking for um.msi - how would we know that and why this particular file anyway.