BIOS PASSWORD. I HAVE A TOSHIBA SATELLITE A215-S7437 MY BROTHER WAS DOWNLOADING SOMETHING AND

Question

I HAVE A TOSHIBA SATELLITE A215-S7437 MY BROTHER WAS DOWNLOADING SOMETHING AND AFTER IT WAS DONE HE RESTARTED THE LAPTOP AND IT ASKED FOR THE PASSWORD HE ENTERED THE PASSWORD AND IT SAID INVALID AFTER HE TOLD ME I OPENED UP THE LAPTOP AND TOOK OUT THE CMOS BATTERY AND JUST LEFT IT OUT FOR 3 DAY AND THEN I PUT IT BACK IN AND TURNED IT ON AFTER IT TURNED ON IT ASKED ME TO PRESS F2 TO SET DEFAULT AFTER I PRESSED F2 THEN IT WENT BACK TO THE BLACK SCREEN AND ASKED FOR THE PASSWORD