How can I recover partition after installing windows 7

Use “Unformat” to recover data from formatted partition after installing windows 7

Use “Recover partition” to recover files if partitions changed or damaged or deleted after installing windows 7.

Use “Full Scan” mode to recover recover partition after installing windows 7 which can not be found with “undelete” and “unformat” and “recover partition”,show as raw partition,partitons which are not NTFS,nor exfat,nor fat32 after installing windows 7. With deep and full scan