Hi Omari,
The ‘dplayx.dll’ file is one of many files contained in the DirectX. Since DirectX is utilized by most Windows based games and advanced graphics programs, the errors related to this file would occur when trying to play games.
I suggest you to perform the troubleshooting steps below and see if it helps:
Perform System File Checker
System file Checker determine whether the issues you are experiencing on your computer are caused by one or more system files.
You can refer to the following Microsoft article to repair corrupt files using SFC tool. Use the System File Checker tool to repair missing or corrupted system files
Refer: http://support.microsoft.com/kb/929833/en-us
Refer to the link below and install the latest version of DirectX and see if the issue fixes:
How to install the latest version of DirectX
http://support.microsoft.com/kb/179113
Hope this helps, get back to us if you need further assistance with Windows.