If there is no back up taken, then only a professional can help you recover the data from the hard drive In an urgent case, if you forgot to get the back up for your data, you really require an expert to the do the recovery for you and you have several, options for that, as there are number of laptop experts available nowadays who can assist to recover the files and data and also modify the damages caused to the hard drive. The most significant principle in hard drive recovery is to avoid writing in the hard drive which is affected. Even, if you have erased a partition unknowingly, don't create another partition. So it is quite advisable to leave it as such, in order to recover the hard drive. After the deleted file is drifted to the recycle bin, if you want that particular file, it is best not to save any data to the drive as the hard drive will neither delete data nor do partition. If you have ever been in a position that you were working urgently in a project and the computer suddenly shut down by itself. You will then try to reboot the computer, then it will display the message that no hard drive found. Then only you will get to know that the problem is with hard drive and you need to retrieve the data as soon as possible. Some of the important tools are not available in it, especially to retrieve eth lost data. If that is the case, then downloading the software will be mere waste. Some may provide you the download for trial basis and you need to buy it if you want to use it. So we can say that, free download of software won't meet the needs for data recovery. In simple manner, it is the crash that has occurred and we need to retrieve files that are lost .Crash data recovery can be crucial when done with a na ve user who don't know what he/she is up to. If you are new to this hard drive recovery, there are certain points that you need to keep in mind to help yourselves. The IBM recovery software utilize the wise technology that is involved in all modern hard disks, which enables the hard drive recovery to evaluate and calculate the time-span that your hard drive will end in Threshold Exceeded Condition (TEC).the IBM software tool can be made alive to execute the TEC model on the chosen drive.