You seem to be saying that the source for your video is a screen recording app like FRAPS. Is that true? If so, there are considerations for this video that aren't necessary for traditional camcorder video.
These screen recording apps often use non-traditional codecs. Apparently your old computer was configured to allow Premiere Elements to use the necessary codec while your new computer is not.
But to advise you we're going to need more specifics.
Open one of your recorded videos in G Spot or Media Info and post to this forum the resolution, frame rate and above all the audio and video codecs the programs list for this video.
Just the following to tuck into the discussion if and when needed.
First what version of Premiere Elements, and on what computer operating system is it running?
1. If you right click the Edit area monitor, select Playback Quality, and the change the setting from Automatic to Highest....and improvement?
2. If you go to Edit Menu/Preferences/General and Timeline Rendering Quality and you have a HD project, is the setting High quality, Slow speed instead of Draft quality, High speed? If not, please change it to High quality, Slow speed. Any improvement? In doing that you are changing the resolution of preview file from 960 x 540 to 1920 x 1080.
Are you importing interlaced video and exporting progressive video?
Yes, it is true that I am using FRAPS -- I should have mentioned that in the original post, sorry. Here are the results of the GSpot test: http://puu.sh/jBiKJ/260a04407d.png (I've never used that program before so I hope that's the right stuff)
I am using Premiere Elements 10 on a 64 bit Windows 7.
I changed the playback quality -- no improvement
I don't have the option of timeline rendering quality in my general preferences (http://puu.sh/jBiZS/811f639b23.png)
Thanks for the reply.
Just a quick comment...
Oops. That Timeline Rendering Quality preference choice did not come in until Premiere Elements 11 and later versions....choice of 1920 x 1080 vs 960 x 540 for preview from HD project. It looks like with your Premiere Elements 10 (without the choices), the preview from HD project is 1920 x 1080.
Thanks for ruling out the Playback Quality choice.