Are you sure you're editing video in PSE 15 (Photoshop Elements)? More likely you're editing in PRE 15 (Premiere Elements).
In any event, it's clear from your screen shots that your project settings are not matching your video specs.
You also seem to be using a pretty old computer. What processor does that computer have and with how much RAM?
Have you manually gone to Windows Update and ensured you have all of the latest updates, including non-critical updates for your system's drivers?
Finally, when you first add a video the beginning of your timeline, do you see a yellow-orange "render" line above the clip? This is an indication of a mismatch between your projects settings and video specs, which could well account for your playback problems.
PS Steve. It is PRE15 and PSE 15. Sorry about that. Jilly
Since you are seeing the yellow render line, your project is not setting up properly to match your video specs for some reason. Try doing it manually.
Start a new project. On the New Project panel, click Settings and, for your video, select preset for AVCHD/HD 1080 (1440x1080) and click OK. Back on the New Project panel, check the option to Force Settings and then start your new project.
When you add your video to the beginning of this timeline, you should NOT see a yellow-orange render line above the video.
If you do see this render line, we will need more complete specs on your video. We may also need you to open one of your video files in the program Media Info so we can see what it's really made of.
BTW, are you editing NTSC or PAL video? That difference between 25 fps and 30 fps in version 12 and 15 is very significant!
Good morning Steve
The settings show as the below currently
And my videos are showing as the below
You asked me to change to AVCHD/HD 1080 (1440x1080) but I can see 4 different ones?
So I wasnt sure which one to go to as even on my camera settings it doesnt really match up with one?
So I went with the HD 1080i 30 to check and I do see the orange/yellow line still?
Within my camera setting it says I am shooting in MP4 25 but there is an option to shoot in AVCHD 1080 50i / 50p
Hope I have put enough info down for you Steve?
Thanks for your help. I am in the UK so there will be a time difference in when you can see my replys
Just to let you know I changed the settings in my camera to use the AVCHD and added this as a new project. There was the orange/yellow line there and I rendered and it seemed to play ok? Have I been using the wrong settings for PRE 15 but its ok for PRE 12?
Since you are in the UK, you are on the PAL TV system rather than the NTSC system.
And now that I know that, you should be using the PAL presets, rather than the NTSC.
Start a new project and, from the Settings, select the preset for PAL HD 1080i, which should show as 1440x1080 25 fps -- which will match your video specs.
I'm not sure why your program is defaulting to NTSC settings. It should know that you are using the European TV standard, based on the country you selected when you installed the program. But that fact may be at the source of some of your problems.
No, Jilly. But you're getting closer.
Look under PAL/AVCHD and select the HD 1080i 25 option.
Thanks for getting back to me
So I have gone back in and changed the settings to the below?
Hope this is correct?
So now it is showing the below settings and I have ticked the Force selected Project setting on this project>
So I have loaded one of the videos that I originally used (which was jerky and jumpy)
There is no yellow/orange line and it also playing back without any jumps!! Yey!!
Hope I have done everything I need to do now Steve?
I do thank you for all your help and just to let you know that I love your video tutorials on You Tube.
I watch loads of different peoples tutorials about PRE and PSE and some I am unable to watch but if I see one by yourself I know that I will be able to follow along and it will all make sense to me
Thank you for your patience and help
You should be good to go now, Jilly! You should have a nice, efficient workflow going now.
And be sure to render your timeline (press Enter) whenever you see yellow-orange lines along the top of your timeline.