Premiere Pro/Encore CS5 playback issues

Question

I successfully created a DVD (of a hockey practice) through Premiere Pro (linked to Encore) with no errors. It plays back properly on 3 different Windows 7 computers through Windows Media Player, but I tried it in my standalone DVD player and it will not even read the disk. This player is older, but it does play rented movies with no issues.
I tried the DVD I created on two other computers running XP OS with Windows media player. It played one one XP computer but not the other. On the one XP computer that was able to read the DVD, when the shot included a skater who was moving quickly, the image of the skater looked like it changed to vertical lines. If the static or slow moving elements of the shot are not look distorted. There is no distortion on the computers running W7 OS.
Since I am ovbiously new to this process, I was wondering:
1.  Why the XP computers (and my standard DVD player) are not able to play the video and what I can do to compensate if a person who wants to view this DVD has XP or an older DVD player.
2.  Why does the other player show quickly moving objects as distorted (and can I compensate for it).
Thank you to anyone who can help.

Answer 1

I'm not entirely sure what you meant by...
"Create an ISO (Encore) or folder on your hard drive (Encore or Premiere Elements) and then use the FREEhttp://www.imgburn.com/index.php?act=download to write files or folders or ISO to disc (send the author a PayPal donation if you like his program)"
Basically, there are three ways to publish a DVD from Encore:
Burn to Disc
Burn to Folder
Burn to Image
Two and three are similar, though different. In two, one burns to a VIDEO_TS Folder, which contains all of the IFO, BUP and VOB files required. This VIDEO_TS Folder can be burned to disc, say with the great, free ImgBurn, or similar, or can be played in most DVD software players. Note: Windows Media Player is not the best, and depending on several factors, might not even play a fully-compliant VIDEO_TS Folder. MediaPlayer Classic HC (free), or CyberLink PowerDVD (either the free, or commercial versions) would be better. There are also others that do a better job, than WMP.
For three, instead of the VIDEO_TS Folder, one burns an Image, or ISO file. Think of this as a ZIP file (though it is NOT a ZIP, but an ISO, the concept is very similar) with the VIDEO_TS Folder inside, plus its files included into an ISO container. This can also be burned to disc, and ImgBurn handles that task well, or can be played via some DVD software players (such as VLC Player), or "mounted" via other software, and then played by most DVD software players.
As you can see, two and three are similar, but there ARE differences. Some users prefer the VIDEO_TS Folder, while other like the contained ISO file.
Good luck, and hope that this helps,
Hunt