Repeated BSODs and freezing - different actions

Hello community, Seeing how nicely people unversed in technical matters are being treated on this forum, has encouraged me in seeking help here. For I’m a retiree and calling me low-brow in technical issues would be the understatement of the year. The trouble began with the computer freezing; I’d to pull the plug to shut it down. Two days later the same. And then the blue screens...