Run (press Windows ker and r key together and let go) eventvwr.msc and hit Custom Views and then Administrative events the next time it happens.
Thanks for the assist, Daniel, but those instructions are a bit unclear to me.
I got the first bit about pressing the Windows and R keys simultaneously, but I don't understand what follows.
Will I see a screen where I type in 'eventvwr.msc', or will a menu pop up where that command(?) is displayed? Do I then click on that, or what?
I'm truly lost after that point. Hit 'Custom Views', then do what? Click on 'Administrative Events'?
I need a slightly more step by step instruction. Thank you for your help!