Does your system have a "Fn" key? If so, try Fn+PrtSc. I that works it means the Function key operation is now opposite of what it once was. If that works... you'll either have a "hotkey" switch (usually ESC + Fn - if so there's usually a "lock" icon on the ESC key), a vendor supplied keyboard utility, or a BIOS setting. Since you recently had to clear your BIOS I'd suspect that's where it is on your system. Look for a "Function keys" setting and toggle it.Here's yet another glitch I've run into with my latest Windows 10 setup. A couple of years back, it was brought to my attention that to Print Screen capture the contents of my monitor and paste it into Microsoft Paint, I just had to press the Windows Key, plus Prt Scn. Now, for some unknown reason, when I attempt this, the Start Menu pops up instead, and the Clip symbol for Paste on MS Paint remains greyed out.
Does anyone know a way around this issue? Quick googling didn't uncover any alternative solutions.