Today I flash my Motherboard BIOS to newer version after successful flash I
restart my system manually from windows and it become shutdown and monitor
become off but monitor stay off and it cant boot then I have to press reset
botton on case and it become turn on, I flash back to older BIOS but problem
not solved!! also I install new windows xp sp2 new Windows can restart my PC
with no problem but I need old windows what I should do?

I have Gigabyte 965P-DS4 + E6300 + 8800GTS