Hi, the U4100 doesn't exist, i think iot is just missing the "S" in the name in the BIOS.
I have the same problem. I don't understand the diference.
How can you say U4100 doesn't exist if the Intel Processor Identification Utility show it?!
Do you clearify the issue?
I have a Samsung laptop with an U4100 1.3 Ghz processor and i need to know if i can install Windows 7, 64 bit on it. if you acn help me in this matter, please do.
My laptop (ACER) has U4100 1.3Ghz and it has a pre-installed Win7 64bit. So I think the answer is yes.