GPU not detected after upgrading to win7Ultimate

Monty104b

Right off the assembly line
Hello digit I have come across a weird problem after upgrading from win7hb to ultimate on my LG P530K laptop having a 2nd gen i5 proc and a gt540m card.The trouble is that windows could only detect the intel hd graphics chip and not the gt540m.I tried downgrading back to win7hb but i get the same result.What could possibly have happened and how can i fix it?
 
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