While your computing is booting, you can instruct the computer to boot in ‘safe mode’. Safe mode refers to secure mode. You may then ask, is our computer not secure when we boot normally. Let us see how is safe mode more secure than the normal booting.
When your computer gives problems and you want to identify where is the problem, then you can use the safe mode for this. In safe mode, only limited number of driver programs are enabled. Therefore you cannot use CD drive. You cannot use the printer. And many other unnecessary drivers are not enabled.