Yes. For devices like desktop computers, monitors, or appliances, you should always power down the device and switch off (or unplug) the power supply before pulling the plug from the wall.
Is switching off a socket the same as unplugging? The only method to ensure no electricity flows through an appliance is to turn it off at the socket and pull the plug out.
It almost certainly won't hurt it to switch off the PSU and unplug it. But, it's likely unnecessary unless you're worried about power surges. It would probably be simpler to use a surge protector that you could turn off.
There's very little reason to unplug your PC when you're not using it. At best, you may reduce electricity usage by some tiny amount, as some components do continue to draw a little even when turned off. Make sure to shut down your operating system properly before doing so.
A lot of the time, it should be safe to unplug most devices without turning them off first. However, it is possible to create "electrical arcs" when unplugging some older devices from the wall before turning them off. Electrical arcs are not common, but they could cause sparks and even a fire.
1. Kitchen Countertop Appliances. Get into the habit of turning off kitchen countertop appliances, such as a toaster or electric kettle, before heading to bed.
From a hardware perspective, sudden power loss rarely causes direct damage. However, the real risk lies in data. If files are being written to your HDD or SSD, they can be lost or corrupted. Windows also needs to properly close processes and flush data during shutdown.
Normally I just shutdown from Windows. If I'm changing hardware out I shutdown the PSU then unplug it. If I'm going away I turn off and unplug the UPS that runs all the monitors, computers and routers. Its best to leave your PSU on, even If your PC is off.
A failing Power Supply Unit (PSU) often causes random crashes, sudden shutdowns under heavy load (like gaming), boot failures, or unusual noises like clicking, buzzing, or loud grinding. You can diagnose it by checking for physical signs, running a paperclip test, or testing its voltage output.
Make sure you turn off at the wall for appliances such as your TV, computer, game console and phone charger. When devices are left switched on, even on stand-by, they are still consuming (and wasting) energy. If you can't switch off your wall plug, unplug the device once it's fully charged or no longer in use.
A fried power supply usually causes total system failure or dangerous physical symptoms. Common red flags include an acrid burning smell, loud popping noises, sparks, or absolutely no response (no fans, lights, or beeps) when pressing the power button.
In most homes, Heating and Cooling (HVAC) systems drive the highest energy costs, accounting for nearly 40% to 50% of your total electricity bill. Following these, the appliances that run up your bill the most include water heaters, refrigerators, and laundry machines.
The top 5 worst appliances to leave on standby
NEC Section 210.52(a)(1) (aka 6'-12' rule): Receptacles shall be installed such that no point measured horizontally along the floor line of any wall space is more than 6' from a receptacle outlet..
A good-quality PC power supply (PSU) typically lasts 5 to 10 years. The exact lifespan often aligns directly with the manufacturer's warranty period, which ranges from 3 years on budget models up to 10 to 12 years on premium units.
You generally need a new power supply if your computer won't turn on, randomly crashes under heavy loads, or emits strange noises/burning smells. A failing unit can also cause data corruption or random component failures.
A failing power supply (PSU) typically emits distinct warning noises like grinding, clicking, or high-pitched squealing. These sounds almost always indicate an issue with the internal cooling fan (e.g., bad bearings or debris) or electrical components vibrating under heavy load (coil whine).
Raymond Larson The shutdown/restart will cause more wear on the components than just leaving it on. Unless you buy really poor components, you should be able to leave it on 24/7 for a decade or longer without problems. Less AC and power is true in the summer, though in the winter it helps heat.
If your computer is freezing, making grinding noises, constantly running its fans, or taking minutes to do basic tasks, hardware failure is likely. Frequent blue screens, unprompted shutdowns, and a battery that barely holds a charge also signal that it is nearing the end of its life.
No it won't do anything at least from my experience. I shut my computer down every night and then turn it off from the power supply because it would randomly turn on and boot loop for some reason. Been doing this for 2 years now religiously. no issues.
A computer is generally considered old when it crosses the 5 to 7-year mark. However, rather than chronological age, a computer is functionally old when it can no longer support modern web browsers, cannot run required software, struggles to multitask, or when repairs exceed the machine's current value.
Watch out for these 12 red flags that indicate your computer has been hacked or infected with malware:
You can keep using Windows 10, but not securely "forever." Since official support ended on October 14, 2025, your PC is no longer receiving free security updates or bug fixes, leaving it increasingly vulnerable to malware.