On partition magic :
Init failed : Error 117.
Partition's drive letter cannot be identified.
It was happen on my disk.
Downgrade lenovo 2000 v200 to XP from vista. First partition is filled by lenovo, about 7 GB. Downgrade and kept the drive. The other partition Is cllean installed and clean format. Now XP running, wiith computer management has another NTFS partition with no letter. Healthy (Unknown partition).
Partition magic, forbid their program to runs, cause their afraid to make more damage.
Just let your drive. Take it as it is. The solution is low level format or clean install with deleting all drive/partition.
This is a known issue with Partition Magic and the protection partition that Windows Disk Protection creates. If Partition Magic can't assign a drive letter to all partitions it gets upset.
Once the protection partition is put in place by Windows Disk Protection, disk partitioning must not be changed or new hard drives added before the Windows partition. Otherwise you can mess up Windows Disk Protection, which remembers the physical drive and partition numbers of the Windows partition.
You also cannot resize the protection partition once it is in place. If you want to change partitions using Partition Magic, turn off Windows Disk Protection, restart, delete the protection partition - called Healthy (Unknown) where your unallocated disk space used to be - and then use Partition Magic to repartition the disk.
Note : On Windows SP2, its not available :D
1) Click "Start", "All Programs", and "Microsoft Shared Computer Toolkit"
2) Click "Windows Disk Protection"
3) Next to "Action at next restart" click "Keep It Off"
4) Click, Reboot and it will be off