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If your computer is experiencing serious problems, either due to a software glitch or malware, and will not run properly, then you might need to use Safe Mode.
Safe Mode is a basic diagnostic and troubleshooting mode that launches the operating system without most of its usual drivers and software. A computer that refuses to start normally because of a catastrophic glitch should be able to start in Safe Mode, where you can attempt to troubleshoot and resolve the problem.
Both Windows and Mac computers have their own version of Safe Mode.
What happens in Safe Mode
Safe Mode is designed to launch your computer with the minimum necessary software to give you access to your operating system, such as Windows or MacOS. That means it starts with a minimal set of services and drivers. For example, you’ll find that when in Safe Mode, your screen resolution is greatly reduced; the full video drivers are bypassed and instead, a simplified VGA driver is used regardless of the screen resolution.
Most or all networking and file sharing features are disabled in Safe Mode as well. In addition, no startup programs or third-party …read more
Source:: Businessinsider – Tech