it is not my BIOS, but the procedure to modify yours !!

 about the risk, yes it is risky, but many people have already done it one other laptops, acer HP vaio, essentialy and no one has reported failure, and the U330 has a bios shadow features, which I don't know how it works. But it looks like that if your bios cannot load, the recovery bios should magicaly take things in hand and give life again to your laptop,

their is also a procedur here : http://forum.notebookreview.com/showthread.php?t=284686&page=1

that explain how to recovery a bios for an insyde Bios. haven't tried it either

Can you please upload your ZIP archive about enabling VT on Lenovo U330 again? I've upgraded my BIOS using post on http://marcansoft.com/, and everything is done as it was said (bytes difference etc.), but nothng's changed.

Thanks!

how did you test your new bios?

here is the file http://rapidshare.com/files/289013507/Procedure_enable_VT.zip.html

about testing, you can use some tools to check it, or use virtualbox or vmware to see if the hardware acceleration is supported

may be it's virtual pc bug, but it doesn't see vt enabled. about virtualbox: seems like vt is working (3 vista's are installed simultaneously) and no prompts come, but i'm in doubts.

check the vmware log (or other product) in vm forlder as the VT flag should not been enabled in VM.

Vista 32-bit or 64-bit?

You can install 32-bit systems withoout VT enabled in BIOS.

When you try install 64-bit system without VT you see information "VT support required" (or something like this)

can you check dmesg output for "kvm: disabled by bios" ? (present if kvm module is installed)

This is the case for standard BIOS w/o VT ... as mine :-(

Othewise VT-D (iommu) seems to be managed when add intel_iommu=on as kernel parameters. Strange BIOS !?!