As the computer reboots, press F2, F10, F12, or Del to enter your computer BIOS menu.  You may need to press the key repeatedly, as boot times for some computers can be very quick. Find the BIOS version. In the BIOS menu, look for text that says BIOS Revision, BIOS Version, or Firmware Version.

TL;DR in Indonesian:
Lakukan reboot (mematikan dan menghidupkan kembali) pada komputer Anda. Bukalah menu BIOS. Catatlah nomor versi BIOS Anda untuk mengingatnya.