Hardware Virtualization Locked Off

[andrewshoggard]

I need a dual boot OS
1) MS Win XP Pro SP3 X86
2) MS Win 7 SP1 Ulti X64
I currently am running on the first one.
Tried to test the 2nd one using VIrtualBOx/VmWare.
Looks like hardware virtualization is locked off for my processor. Which is Intel Core2Duo E7400 2.80 GHz.
I know that it supports 64 bit OS.
Problem is I'm unable to test the 64 bit OS with VT Off. Need a custom BIOS or probable some guidance to Unlock VT.
Bios is updated to 0601. Motherboard - ASUS P5KPL-AM (PS)
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Thx