Inno Setup doesn't allow access to all registry keys, why?

Question

I use this code to know if a key exists or not:

if RegKeyExists(HKEY_LOCAL_MACHINE, \'Software\\Autodesk\') then         


        

Answer 1

Let me guess... you're on Windows 7 64-bit?

It's not InnoSetup's fault at all, it's that the Registry is virtualized in Vista & higher, and on 64-bit there are branches for native 64-bit and WOW'ed 32-bit.

In this case, since InnoSetup is a 32-bit program, the OS directs all of its HKLM\Software Registry requests to the WOW6432Node.

If your program is 64-bit, then you want to use a 64-bit setup program too.