When their computer crashes and had to reinstall everything from scratch, they had to go through the trouble of searching for the license number to activate the software that they’ve purchased. Although backing up of files is important, many people forget to backup the Windows product key or third party software license that is installed on their computer. There are many backup software on the market and some of them does a really good job in making sure that there is an exact copy of the important files available at the backup drive.