This is the BIG issue introduced with Vista.
Either turn off User 
  Account Control, or run the program as Administrator.
I think this 
  feature was in XP Pro, but turned off by default, in Vista, it was turned on 
  by default, hence the shock to new users.
Go to [Control 
  Panel]>[User Account] and turn off User Account Control. Albeit, some rogue 
  program could execute an exe file without your authorization. BUT if you turn 
  that off, you are now more in an XP world.
Otherwise, and maybe the 
  safer mode, is to execute the program in Administrator mode, which in effect 
  YOU are, as this is a PC at home, and not in a public office 
  environment.
Do look at Total Commander as an Explorer replacement, and 
  check the boxes under properties to [X] Run as Admin....
Your 
  choice.
All 32 bit applications do go by default to the <x86> 
  program folder on a 64 bit system.
Comments?
----- Edward 
  Pottasch 
wrote:
  
  
  > I received the 64-bits version of Windows 7 on a 
  > new computer. Installed 
  Amibroker up to 5.2 (32 bits version) and want to 
> install the 
  latest beta now.  Go to the devlog page and download the latest 
> 
  beta. The run it. It starts off asking to extract it in C:\Program Files 
  
> (x86)\Amibroker