Darlene,
At this point, I would probably suggest using System Restore to get to a point before you installed the DX media objects/widgets.
In many cases, these DX objects are calling to the Media Player offered via Stardock Central, which can read and play media.
If System Restore fails, you could try to install the WMP 9, as the installer should search for other versions during installation - and inform you if any problems arise (note - make sure to set a restore point before attempting this installation).
If all else fails, and you have the Windows XP installation disc, you can do a "Repair" operation to restore Windows XP. This generally leaves the current programs installed intact, though some custom settings may be cleared.
If you do a repair, back-up all your saved files, and then do the following:
1 - Restart your computer and hit whatever key is indicated to enter the "BIOS" settings (usually referred to as "Set-Up") > look for the Boot Options screen or section in BIOS settings (it will be a list of devices in numerical order, which indicates the order in which the computer looks for the Operating System to load).
2 - Set the CD drive as the first device, if it is not already set that way (there should be text indicating how to move devices up and down in the list) > hit the proper keys (usually indicated on the bottom of the screen) to save changes and exit.
3 - After booting successfully to Windows, place the Windows XP installation disc in the CD drive, and restart the computer.
4 - During boot - watch for the text "Hit any key to boot from CD", and then hit a key. Wait a bit as set-up gathers information and displays a screen with the option the hit "Enter" to enter Set-Up.
5 - Hit "F8" when prompted to accept the EULA > wait to see the screen offering options to "Repair Windows XP", or to "Install Windows XP" > select the option to repair by hitting "R" > follow the prompts to repair the current installation of Windows.
That should set you straight, but obviously is a last resort - so hopefully, someone with more knowledge than I have will drop by with a better alternative.
Will check back.