Some time when you boot up your system you may get the error message "system missing", actually, this not means your system was run away, such errors may caused by damaged Master Boor Record (MBR), in this situation you need to use some special tool to rebuilt correct MBR to the computer without destroying any data. Now we have added this feature in the new update partition magic for windows 7-Partition Assistant (PA). The following are the detailed steps about how to rebuild MBR with PA.
Download Partition Assistant from partition magic windows 7 download
If the boot files are corrupted, the rebuild MBR feature could not solve this problem.