If your BIOS chip was bad or corrupt in any way chances are the machine would not even boot at all. The problem with Windows is very likely an issue with the image. If it boots into Windows 8 it's not the BIOS I recommend reinstalling the OS (back up your data first)
When you updated the BIOS, the SATA mode was likely changed and now the system is having trouble booting.
Power the system on. Enter the BIOS. Set the SATA mode (IDE, AHCI, or RAID) per your original configuration. If you aren't sure what it was, using IDE is sort of the default base setting. Using it should work unless you had a RAID installed.