Null Error on Paint.NET Installation

Why am I receiving a (Null) Error whenever I tried to install Paint.NET on my Windows XP computer? I attached the screenshot of the error message that I keep receiving when trying to run the setup of Paint.NET. Does anyone have a suggestions or ideas on how I can mend this problem? If so, please help me.

System.IO.FileNotFoundException: Could not load file or assembly 'System Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.
File name: 'System Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
at PaintDotNet.Setup.SetupWizard MainImpl(String[] args)
at PaintDotNet.Setup.SetupWizard.Main(String[] args) in
D:srcpdnpdn_35xsrcSetupFrontEndSetupWizard.cs: line 976
WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLMSoftwareMicrosoftFusion/EnableLog]
(DWORD) to 1
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLMSoftwareMicrosoftFusion/EnableLog].
OK
