Your data is lost completely only if overwritten with other files. XP and other modern Operating systems from Microsoft, all use NTFS (you don't have to understand the abbreviation to use it, right?) NTFS is an advanced disk formatting that has many useful features including ways to recover lost data. Advanced NTFS Recovery is a user-friendly tool that utilizes NTFS features allowing you to recover files from damaged NTFS volumes or even recover whole volumes in case of them being lost or unintentionally formatted.

When accessing a drive, your system follows the sequence from the master boot record to the partition table to the partition boot. In case of a file it's the master file table, data attributes and the cluster chain. If any part of the sequence fails, the system won't be able to retrieve data. This is true even when the data itself is intact. Advanced NTFS Recovery is a dedicated tool that can solve such problems. It restores user access to partitions and drives which the system can't see for any reason. It can likewise recover files that are marked as deleted but are not overwritten yet.