possible hardware issue yan, parang shorted or may naka-trigger na sleep hotkey sa keyboard matrix pag pinipindot yung r, f, v. try mo muna disable sleep key sa power options: control panel > power options > choose what the power buttons do > set sleep button to do nothing, tapos check mo rin keyboard settings at update/reinstall keyboard driver sa device manager. test ka rin gamit external usb keyboard, pag okay sa external keyboard pero sabog pa rin built-in keys, keyboard flex or mismong keyboard assembly na yan, need linis/reseat flex cable or palit keyboard. kung may recent spill or nabagsak, mas malakas chance hardware talaga. temporary fix muna onscreen keyboard or external keyboard, pero best dalhin sa tech para macheck flex at board bago lumala.