windows 8 and cpu 128 bit

Computers won't go to 128 bit for a very very very long time..

A 32-bit address register meant that 2³² addresses, or 4 GB ofRAM . This is the MAXIMUM THEORETICAL TOTAL AMOUNT OF MEMORY a 32 bit system could handle. So if you have 32 bit, and you have 4 GB or RAM, and 512MB of GPU RAm, your computer will only use 3.5GB of RAM for the main system.. 4GB TOTAL. The 4GB max was implemented on almost all 32 bit systems..

64 bit however does not double this.. infact it does much more than that.. currently on windows 7/vista i believe the maximum memory is 192GB (that's only if you have prof/enter/ultimate) If you have Starter/Home it's 8 GB if you have Home Premium it's 16GB

The theoretical MAXIMUM for 64-bit is actually 16 EXABYTES. 1GB=2^30 an exabyte is 2^60th.. now to give you another sort of referance of how large an exabyte really is.. "As of March 2010^[update] , the global monthly Internet traffic is estimated to be 21 exabytes"

So i suppose to answer your question.. don't listen to your friend he doesn't know what he's talking about. I've never even heard of a 128bit CPU. I've never heard of Windows 8. And any modern notebook will run vista or windows 7. Your CPU will be most likely be 64 and 32 compatible (if the computer was made in the last 3 years) Windows is either 64 or 32 bit, but if you have the 64 bit, like I do, then 32 bit apps will still work just fine.. But in theory you can get more performance out of a 64bit application/software. The biggest reason to get a 64 bit version of windows in my opinion is to allow for more than 4GB of memory on your system.