LoL I did not mean on ALL programs.I just said that in the case if he has programs which do not support 64-bit structure and are very important for his work.But I am pretty sure that he does not use older programs so he shouldn't have any problems.
Yes it's true that many 32-bit programs are also programmed to support 64-bit structure,but not all of them.There are many who does and also many who doesn't.So I just wanted to let him know that he checks his important programs to see if they support 64-bit before he buys 64-bit OS.Because if they don't,he will need to also spend money on those programs as well.
But like I said...he probably uses newer programs so hopefuly he shouldn't have any problems.
Cheers folks!