Should you leave your PC on or off? Well, it depends on whether the PC (personal computer) is in a home or work environment.
CMOS Batteries
Do you know how the time is kept correctly on your computer even when it is off for a few days? It is all due to the CR2032 CMOS Batteries (GC02001R000 is you have a laptop) that are placed on the motherboard. These batteries, typically non-rechargeable CR2032 versus rechargeable LR2032, last three years, which is often the warranty length of the unit. The more times the PC is kept off, the more times the PC has to depend on the CMOS batteries, thus reducing the lifespan of the batteries; unfortunately, when the battery fails, it will cause error messages to display during POST. Sure, you can press a button on the keyboard to continue, but if you need to restart a PC remotely, someone still has to go to the machine and hit a key to continue unless you set up a robot arm as well or have it boot headless.
Computer Updates
Leaving a computer on also gives the OS (such as Microsoft Windows) the opportunity to search, download, and install updates. Your antivirus program can also install new definitions and scan your data and programs. Keep in mind that the HP LaserJet 1022 and Windows Update on Windows 7 can cause issues at times, so set Windows updates to manual instead of automatic.
