Crashes happen. The power goes out. And sometimes, people accidentally close a file without saving. To avoid losing all your work when stuff like that happens, make sure AutoRecover and AutoSave are turned on:
To be extra safe, enter a small number in the minutes box, like 10. That way, you’ll never lose more than 10 minutes of work.
On the other hand, if you want to make Office faster, try entering a larger number in the minutes box, like 20.
AutoRecover saves more than your files. It also saves your workspace (if it can). Suppose you open several spreadsheets in Excel and the power goes out. When you restart Excel, AutoRecover tries to open your spreadsheets again, laid out the way they were before, with the same cells selected.
In Word 2010, Excel 2010, and PowerPoint 2010, AutoRecover has another benefit. It can restore earlier versions of your file.