UNEXPECTED ERROR NO VISTA

Citação:

The fact that the account you are using is a member of the local administrator group doesn[ô]t mean that Vista executes the process with those privileges. You need to explicity tell Vista to run it as an administrator (right click on the process and choose <Run As Administrator>. I have had to do this to perform several tasks that would have run normally on XP. My understanding is that this is inherent on the Vista security model.

Citação:

Windows NT/2000/XP/2003 & Administrative Privileges
A typical Inno Setup installation running on Windows NT/2000/XP/2003 does not require administrative or [Ô]power user[Ô] privileges. However, there are exceptions as noted below.

Things that require administrative privileges on both Windows NT/2000/XP/2003:

Using [Ô]PrivilegesRequired=admin[Ô] in the script[ô]s [Setup] section. This causes Setup to abort with an error message if the user lacks administrative privileges.
Using the [Ô]restartreplace[Ô] flag in the [Files] section. This flag causes Inno Setup to call the MoveFileEx function, which attempts to write to [Ô]HKEY_LOCAL_MACHINE\ SYSTEM\ CurrentControlSet\ Control\ Session Manager[Ô]. Write access to this key is restricted to Administrators.
Writing to any key under HKEY_USERS\.DEFAULT using the [Registry] section. Write access to this key is restricted to Administrators.
Things that require either administrative or [Ô]power user[Ô] privileges on Windows 2000/XP/2003:

Using [Ô]PrivilegesRequired=poweruser[Ô] in the script[ô]s [Setup] section. This causes Setup to abort with an error message if the user lacks either administrative or [Ô]power user[Ô] privileges.
Using the [Ô]regserver[Ô] flag in the [Files] section. In most cases registering a DLL involves writing to HKEY_CLASSES_ROOT, a privilege not granted to ordinary users.
Using the [Ô]sharedfile[Ô] flag is the [Files] section. This flag causes Inno Setup to create/update a value in [Ô]HKEY_LOCAL_MACHINE\ SOFTWARE\ Microsoft\ Windows\ CurrentVersion\ SharedDLLs[Ô]. Ordinary users are not allowed to write to that key.
Using the FontInstall parameter in the [Files] section.
Writing to any key under HKEY_LOCAL_MACHINE or HKEY_CLASSES_ROOT using the [Registry] section. Ordinary users are not allowed to write to those keys.
Inno Setup itself does not require write access to the WINNT directory, or any other registry keys not mentioned above.

What is different when an installation is run by a user without administrative privileges?

The registry key for the Add/Remove Programs Control Panel entry is created under HKEY_CURRENT_USER instead of HKEY_LOCAL_MACHINE. Thus, only the user who installed the program will see an Add/Remove Programs entry for it.
The [Ô]{group}[Ô] constant always points to the current user[ô]s profile, as opposed to the All Users profile.
All [Ô]{common...}[Ô] constants are equivalent to the [Ô]{user...}[Ô] constants.
The program may be uninstalled by any user. (When an administrator installs a program, only an administrator is allowed to uninstall it.)