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If your PC is old, check your battery for the bios on your mother board. It costs 2.50 to replace. You bios may not be saving your setting or worse, you bios may be trashed ( YOUR motherboard as well. I would first open the PC and make sure every damn card is in tight. Your memory chips are tight, All you cabels are tight and all corson the exterior and screwed in tight.
Check your batter. It is a round silver lithium battery, Check it and if poor replace it. I do it once a year. Hope that helps.
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