Ver 1.45 is available here but I think this still uses the Windows flash utility.
You could extract it using WinRaR and try it under DOS.

The reason that there are OS-specific versions has more to do with how the update utility gets Windows to allow it access to CMOS memory. The actual BIOS will be the same. If you search for the error message on Google, you will find plenty of work-arounds. However, the simplest solution would be to use the DOS update utility that comes with the zip file. If your laptop doesn't have a floppy disk drive, there are plenty of websites that tell you how to flash DOS to a USB memory stick.

The zip files include both Windows and DOS flash utilities.

I have done it now but only to v1.43 as i thought that was the latest as it was the only one on the site, i might try updating it to the v1.45 though.

Got v1.45 on now.

Post deleted by tomxlisa

Edited by tomxlisa (Sun 29-Apr-12 20:47:28)

In reply to a post by tomxlisa:

Got v1.45 on now.

Does it make a difference?

In reply to a post by micksharpe:

The zip files include both Windows and DOS flash utilities.

It's according to where they're downloaded from. Some do and some don't.