Battery
Clock reset to 2017... CMOS battery?
Either way, nothing that can't be solved with ample application of the cattle prod.
Welcome to another in The Register's occasional series on computers flashing their undercrackers to all and sundry. We've all been there. Popped to the shops for some pasta and come back laden with bork. Take exhibit one, snapped in a Sainsbury's by intrepid Register reader Russell Sherr on one of his government-permitted …
Surely the box controlling that display should be locked down with at least a BIOS access password so even with a keyboard plugged the used would get a password prompt on pressing F1/Del/Whatever. Even if this is a remote access (not sure if the local screen would display during this process, I've not personally done it), then the remote admin bod should have been in and out of that screen pretty quickly. Few systems can or should boot into the BIOS config screen, especially a plain vanilla BIOS like that. Some of the more "clever" Asus and similar aimed at home users might do so if there's a failed boot or corrupt/mis-configured overclocking settings.