The most common reason for this is some process interrupting the program. Are these computers on a network, for instance, that might be interrupting things? Do you have an intrusive antivirus program like Norton? (Try turning it off.)
Beyond that, what model of camcorder is your video coming from and what format and resolution is this video?
When you add the first clip to your timeline, is there a yellow-orange "render" line over this clip? This render line is an indication that the program has NOT matched its project settings to your video specs, which can result in inefficient performance.
Both computers are on a network, so I tried disconnecting the new XPS 8900 from the network to see what effect it had.
When I unplug the network cable on the XPS 8900 the video plays correctly. When I plug the cable back in the video starts to pause randomly again.
I also tried connecting via wi-fi. When connected the video pauses randomly, when disconnected the video plays correctly.
Do you have any suggestions to get the video to play when there is network activity?
Some process on your network is interrupting the program. Premiere Elements is designed to stop playback every time the program is interrupted.
Beyond that, I don't know enough about how networks (or your network in particular) work to give you any specifics.
But I'm glad we could help you isolate the problem anyway.
It seems like some update start running in the background when you connect to internet. This causes the removal of focus from the play button of Premiere Elements. Hence the video stops. So, look for background processes and pause them till the time your video is running.
I resolved the issue.
I spent hours working on this. I clean installed Windows 10 several times. I removed every app and service that I could delete. Nothing but the bare minimum was running. I changed every setting I could to see what effect they would have. Still Premiere Elements would not play without pausing.
I read many posts that described similar issues. Some people we disabling firewalls and virus scanning and were even disconnecting from the network just so they could use Premiere Elements.
In the end I dumped Premiere Elements and installed CyberLink PowerDirector. That fixed the issue. No more pauses, and the rest of the program meets my needs. I'm glad I finally found a solution.