Upgrade to Win8.1 after the hard disk data garbled what to do

Although recently received a lot of information about the WIN10 system upgrade, but I have not been tempted, no way, for the WIN10 system is no interest, perhaps because I used to use the WIN8 system, it is said that the WIN10 system on the basis of the WIN8 system has a great change, This makes me a little tangled, after all, finally familiar with the WIN8 system, if this is familiar with the new system, or very troublesome, some do not need it, plus the recent WIN10 system constantly upgrading, who know this system is new, is not stable enough, now upgrade is not the most ideal time, So I just put my win8 first upgrade to win8.1, or some new features can be used!
But unexpectedly, after the upgrade is complete, I actually encountered a problem, that is, their computer hard disk data has become garbled, because the system is upgrade, not reload, so I did not have to backup the files in the computer, who would have thought of such a problem? Suddenly, I really do not know what to do!
So I had to go to our company's network management for help, this is our company dedicated to do the network management, technology is good, many times encountered the computer difficult and incurable diseases are this person to help solve, but do not know this is garbled files, he will have a way? Finally network management to me introduced this invincible data recovery software , said can be damaged data repair, but he is very busy, let me study, I thought it would take a lot of time, did not expect this is a fool-style software, only used less than half an hour of time, This invincible data recovery software to restore my garbled information back.

Upgrade to Win8.1 after the hard disk data garbled what to do