While 85 percent of lost computer data can be recovered by users themselves using available recovery and undelete software, sometimes the scope is so large, the corruption level so high, or the problems that caused the data loss more than the average user can handle that you may need to resort to using a data recovery service. For example, your computer could have been damaged by flood or fire. Or you may not be talking about a single hard drive on a single computer, but rather multi-disk RAID, SAN or NAS devices. Or perhaps the CD or DVD you used to back up data has itself become corrupted, scratched or damaged in some other way. In any case, if the data recovery process sounds too difficult or you just trust that someone else may know better how to handle, you can always turn to a service specializing in data recovery.