Logically, if you are getting error messages flashing with the non-modified bios, it ought to tell you something....there is a problem with your machine and it is not the bios file. I will get back with you in a bit.
You do not have a samsung certificate...there is no samsung certificate out at this time which will activate windows 7.... You have a Toshiba Certificate and that is what you should use because you have a toshiba slic in the bios.
thanks for ur time and the quick reply....one more thing..how do i flash using winflash?? do i extract the sp39862 file and then from the extracted folder replace the original BIOS.WPH and 30CCF58.WPH files with the modified ones and then running winflash utility from that folder?? i am new to bios flashing and the dos method looks confusing.... for the dos method do i have to just create a bootable flash drive and then at startup just booting from that flash drive will automatically flash bios?