I have an old ThinkPad A31 sitting quietly on my bedroom. It runs on CrunchBang Linux and it starts to get boring. So I have this idea of trying Windows 10 on it. It passes the requirements, 1GHz and 1GB RAM, 20GB HDD, What else could go wrong?
I booted the DVD, seems fine.
...but a few minutes later...
So, after some research I found out that the A31's Pentium IV Processor doesn't support that NX bit thingy, and starting Windows 8 they require that on the processor :(