The logic was that the surge of power when turning the computer on would shorten its lifespan.
While this is true, leaving your computer on 24/7 also adds wear and tear to your components and the wear caused in either case will never impact you unless your upgrade cycle is measured in decades.
Is it OK to leave your computer on 24 7?
If you’re asking if it’s safe to turn your computer on and off as needed, the answer is yes. It’s not something you should worry about until the computer reaches old age. If you’re asking if it’s safe to leave a computer on 24/7, we would say the answer is also yes, but with a couple of caveats.
Does leaving your PC on damage it?
“If you use your computer multiple times per day, it’s best to leave it on. “Every time a computer powers on, it has a small surge of power as everything spins up, and if you are turning it on multiple times a day, it can shorten the computer’s lifespan.” The risks are greater the older your computer is.
Is it bad to leave your computer on overnight?
There’s no point turning your computer on and off several times a day, and there’s certainly no harm in leaving it on overnight while you’re running a full virus scan.
Is it better to turn computer off or leave on?
Our recommendation for most users is turn off your computer when you go to bed as it will save you a bit of money on your electricity bill. However, if you want tasks to run during the night, such as a backup, ScanDisk, Defrag, or a virus scan, you’ll need to leave your computer on while you sleep.