I came across an interesting comments online about the pros and cons when you turn on your personal computer(PC) all the time. I often use my PC at work and at home, too. So, I would like to summarize and share some of the interesting points here. Many people might worry about if we should turn off your PC after you work every time you use it. Because it takes some time to start up your PC again once you shutdown it. The upsides to keep turning on PC are as follows 1) It turns on quickly 2) It puts less strain on Hard Disc Drive(HDD) 3) Data in the storage is hard to be gone. These are in case of long use at work. On the other hand, the downsides are 1) It eats a lot of electricity bill. 2) It deteriorates and shortens lifespan of a PC. 3) The cooling fan is noisy during the night 4) Sometimes it is forced to be shutdown for some reason. Especially regarding electricity bill, a penny saved a penny earned. The comments shows how you should handle depending on the use frequency of your PC. A) A few times a week: Shutdown every time after you are done. You sometimes start up your PC even when you don't have to use it. B) A few times a day: Use sleep function during the day and shutdown your PC during the night. C) Long time use every day: Basically use sleep function. Shutdown it once a week. I think I have to distinguish my PC depending on where I use it,