I think you added a zero to your model number. The T40 is a very old laptop without the NX (no execute) bit. The T400 is a reasonably modern laptop that runs Windows 8.1 . The problem people run into with W8.1, if the T400 has switchable graphics, is that the AMD driver reports a "bugcheck". But th...

Hello,

I have a Lenovo T400.

I want to install windows 8.1 in my PC, but I Can't because Windows say that my PC don't have NX Processor Technology.
(Windows 8 works, but windows 8.1 don't)

Someone can help me?

(Sorry for my English)