"Elevation" on Windows XP: not always working

Hi,

I have an installer that needs to be run as administrator.

On Vista: no problem, I get an elevation prompt.

On XP: it works sometimes:

-> When creating a simple local user with no rights on an XP machine, an login prompt shows up when I run the installer. This allows me to login as admin
-> When logged in on a domain with a domain user (no admin rights), the installer just start to run (and then bumps into a security error).

How come? How can I always force this login prompt to show up on XP?

Thanks for you help!

Why didn't you try searching the forums before you asked? This question has been asked hundreds of times before.

requestexecutionlevel admin and/or UserInfo plugin.

Originally posted by MSG
requestexecutionlevel admin and/or UserInfo plugin.

UserInfo plugin and optionally requestexecutionlevel (Meaning, if you use requestexecutionlevel admin, you MUST also use UserInfo to deal with UAC off, < NT6 etc)

Err, oops. Thanks for the fix, Anders. 🙂

Originally posted by MSG
Why didn't you try searching the forums before you asked? This question has been asked hundreds of times before.

requestexecutionlevel admin and/or UserInfo plugin.

I DID search the forums before I asked.

The doc says about "RequestExecutionLevel":
"Specifies the requested execution level for Windows Vista and Windows 7."

My question is about XP.

I already use the UserInfo plugin, so I can determine if I am admin or not. However I want to give this login prompt automatically, not a box saying "please run as admin".

So why the inconsistent behaviour on XP? How to get it working?

You can use the UAC plugin to elevate in .onInit, that will runas a second instance of the installer, as admin. That should automatically display the login. (What do you currently use to get the login screen on XP? I don't think I've ever seen XP do that automatically.)

Thanks, I'm now looking into the UAC plugin.

It appears that the Windows XP I was using for my test has *something* installed on it, so the elevation prompt is automatically shown.