So what do you do if you haven’t been using a backup plan and your system crashes or a virus wipes out your files? You will probably have to call in the pros at this time. There are many companies that specialize in recovering data from any type of media for just about any type of system failure. Some of the companies also specialize in recovering certain types of files that have been corrupted. For example, if you have a corrupted Microsoft Excel file, look for a company that specifies expertise with that type of file.