plus one for thisUPS is suggested as your device will turn off when there is a power cut. Issues arising could be
i) If there is high frequency of power cuts, there will be abrupt shut downs which is not good for the components.
ii) if you are working on anything and have not saved the same , all progress is gone (depends on software too), applies for in-game save too
iii) Protection against spikes which again can be achieved via cheaper alternatives but ups also facilitates the same
without UPS there is a high chance of data corruption including OS getting corrupted and hdd going bad, so have a ups which at least supports for 5 mins where you can put the system to sleep or shut it down