Back ups made with "Univeral Bios BackUp toolkit" = No platform data hence can not be flashed On a hunch, i figured the difference in size from the one generated using "Universal Back Up Tool kit" may be the missing "Platform Data" that is required to flash it. I Checked the file size and it came to 1027kb.
Winphlash generated a "BIOS.BAK" in the same folder. Then, i tried to back up using Winphlash but, as everyone who tried before have found out, it needs a copy of the original bios which i don't have! So, i used the R1150J9 since it's the closest one i found. First, i backed up my bios(R1101J9) using "Univeral Bios Back up Toolkit". I have a vaio vgn-nr series (bios R1101J9) with intel GMA(x3100)and was able to download an unofficial modded bios R1150J9 also for a vgn-nr series(nvidia chipset).
Unofficial "modded"(downloaded from other sites) Bios: Official(from sony download) closely related to the one you have or:
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