Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The XDC file type is primarily associated with 'Acrobat' by Adobe Systems Incorporated.
Adobe Acrobat is a family of computer programs developed by Adobe Systems, designed to view, create, manipulate and manage files in Adobe's Portable Document Format (PDF).
Some software in the family are commercial, and some are free. Adobe Reader (formerly Acrobat Reader) is available as a no-charge download from Adobe's Web site, and allows the viewing and printing of PDF files. Acrobat and Reader are widely used as a way to present information with a fixed layout similar to a paper publication.
An XDC file is a printer description in XML format. Adobe document services require this file to create the print files. PDF-based forms can only be printed on printers whose SAP device type have an XDC file in the system.