Notes about the XXXXXX file extension:
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 XXXXXX file type is primarily associated with 'allTunes' by Mediaservices, Inc.. If an allTunes download aborts part way through this file type is written as the partial download to be completed later. The file will likely be of no use until it is complete.