If not and the computer crashes in the middle of your work, all your hard work that you have put in that work will go as a waste. But if you have saved the data, then you can rest in peace as the saved data will be available to you after the system is restored. The reason why a computer crashes is mainly either because it has a certain corrupted system files or it has a virus. But most of the time it is the corrupted system files that make a forced shut down to the computer.
Now once the computer crashes, try rebooting it. If the reboot goes on fine, then you can assume that the computer is back to normal and has temporarily solved the corrupted file problem. But if the computer fails to reboot properly use the safe mode to reboot it and then try using computer maintenance software which will annihilate the corrupted files and provide you with new ones that will help the system to restore its previous good known configuration.
Computer crashes are often a bane but when one has a backup of all the files that he works on, they won’t really bother the person.