Software installation rights Win2K3

I've set a user to be an administrator and to have full control of his PC in Win2K3. But he still doesn't have the rights to install software it seems as he gets an error saying so. How can I give him the necessary rights or even all authenticated users (small company).  
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Check to see that there is no group policy restricting the number of administrators for a machine ...

Also check he is not put as power user

ncwAuthor Commented:
I think I may have set him as a power user, if both Admin and Power user them I assume the most restrictive user type applies. Is it in AD, under users, user properties, 'member of' where I need to check that?

Where would the setting be which limits install rights? I'm sure I've seen it as a checkbox when I was creating a group policy, but I'm certain I did't apply the GP.
I donot think power user can install softwares

check to see if he has been put as power user


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I think your right there sunray. Have to be an admin to modify the registry. Unless you put special permissions on the different reg Keys (not fun).

That's risky though If this 2k3 box is a domain controller.
ncwAuthor Commented:
So many third party programs for the small office environment require access to the registry, eg ACT! (see it means that each user must have admin rights just to access the registry, unless group policy properties can allow a 'user' to have the additional rights of registry access without any further additional admin rights. This is crazy.

Without access to the registry systems become unusable, software developers will have to return to ini files. Presumably restrictions apply to only certain keys in the registry.

The risk in this particular installation is minimal as it's a small company with 5 networked PC's, but I wanted to get the pricipals correct.
Well, remember that reading and writing are seperate things and there are always sections of the registry roped of to allow full read/write for users to allow for storage of things like most recently used files and the like.

Take a look at the following:
ncwAuthor Commented:
I'm still not exactly sure what the problem was, but it is possible that the user was in the administrator's group but also set as a power user.
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Windows 2000

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