About the first game, going kts instead of going CA, could turn the game in a diff direction. Slam was full feodal army. CA are not that effective if you can't mass them.
I'm saying all that 'cos I saw opportunity for you to win Vinchester. Good luck for both of you!
Sounds like Videocard problem or RAM. Try to figure it out if VC cooler works ok and if you have 2 pieces of RAM chips, try with only one.
About VC, see if you have built in VC on the motherboard. If YES unplug the one from the slot and try to turn it on.
About BIOS, REMOVE THE POWER SUPLY...