I have a d845pt motherboard(my old pc) and tried to update the bios now I can only get into the bios setup, and the screen beyond the says "CMOS/GPNV Checksum Bad" I went to dl the bios revovery file and all intel has is the express update. I extraced the files from it and there is a .bio file in there...can i use that as the recovery bio file? What should i do?