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Scheduled performances and maintanence when computer is off


I'm trying to deal with my internet addiction so I decided to try to use my PC a lot less and I think one way to help with that is to just turn my PC off. But it might be off when it's time to do virus scans, defrag and whatever else that needs to be done but I might turn my computer off at different times. Will all those scans and stuff run the minute I turn my PC on if they missed a schedule?

My Computer

System One

  • OS
    Windows 8.1
    Computer type
    Mozilla Firefox and Google Chrome
    Country Flag
    State/Region Flag
    us virginia


I see that you ask two different questions, about keeping PC offline in general and scheduled settings in particular.

In general, you can keep PC offline or switched off indefinitely. Of course, when it goes on/online and some important tasks, needed to keep OS in the healthy state, were missed, OS will try to do them ASAP, which can make PC semi- or almost completely non-responding for a few minutes, especially if you have missed important system updates (if you have a setting to install them automatically). So, it would be wise to switch PC on at least once a month only for maintenance in a day after important updates are released, doing nothing until the updates complete.

In particular, whether a task will be run immediately after the schedule is missed, depends on a setting in the Task Scheduler. You can open TS and look at this setting in detailed view of any task, Settings:

[ _ ] Run task as soon as possible after a scheduled start is missed

Whether this option is ticked, depends on developer's decision. You may change it, but better to leave as is.

My Computer

System One

  • OS
    Windows 8.1 Pro
    Computer type
    i7-6700 (Skylake)
    Asus Maximus VIII Gene
    16 GB
    Graphics Card(s)
    Asus GeForce 1050 Ti, 4 GB
    Monitor(s) Displays
    Philips 235PQ
    Screen Resolution
    1920x1080 (FHD)
    Hard Drives
    Samsung SSD 950 Pro, 512 GB

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