Windows client security lockdown with nifty tool from Microsoft

It’s been around for some time and if you did not already know about it Microsoft provide the free tool called Security Compliance Manager. You can use it to very easily manage and export a set of pre-configured (or settings that you configure on your own) settings that improve security. You can then export these settings to for instance a group policy and import it into your domain.

There are templates with pre-configured security lockdowns for Windows XP, Windows Vista and of course also Windows 7. The tool works great for creating a security baseline for your client machines but the only downside is that you cannot import nor in a convenient way compare the settings in the templates with what you currently have.

No more duplicate drivers in ConfigMgr, thanks to a patch!

So to end the pain of handling duplicate drivers in System Center Configuration Manager there has been a hotfix released that resolves the issue with “The selected driver has already been imported at this site”, at least partly, depening on what method your are using to apply drivers. Read more about the affected scenarios at the Mike Niehaus blog and download the hotfix from Microsoft.

Group policies messing with your Windows 7 deployment

There a number of group policies that can interfere when you are deploying Windows 7 machines, one of them being the “Admin approval mode for the built-in local administrator account” which if set to enabled breaks deployment using the Lite Touch scenario using Microsoft Deployment Toolkit.

My fellow MVP and now also colleague Johan Arwidmark has a blog post on two methods for handling problems related to group policies when dpeloying machines, either by settings filters on your group policies or postponing the domain join process.

HOW TO: Cleanup pre-SP1 components in Windows 7 and Windows Server 2008 R2

Many of you surely remember the tools “vsp1clean” and “compcln” which was used after service pack 1 and service pack 2 installation to remove older Windows packages which was superseded by the service pack. These tools freed some disk space and as it removed all previous Windows components it made the service pack installation permanent, meaning it was not uninstallable after running the tools.

Anyway enough with history, when you have installed SP1 for Windows 7 or Windows Server 2008 R2 you can make it permanent by using the below command.

%windir%\system32\dism.exe /Online /Cleanup-Image /spsuperseded

You can also use Disk Cleanup to accomplish this, choose to clean your system disk and then choose “Clean up system files”, choose your system disk once again and then make sure that you select “Backup files required to uninstall service pack”.

NOTE 1: As SP1 is in beta at the time of this writing, I must warn you that running the above command will make it impossible to uninstall the SP1 beta, in practice meaning you will have to reinstall your machine once SP1 final release is made available.

Missing tabs in ADUC?

Remote Server Administration Tools is great when you want to administer your servers from your Windows 7 clients. If you are using ADUC (Active Directory Users and Computers) you might have noticed that you are missing some tabs when you choose Properties for a user account? The solution is to be found here!

Killing the myths: Group Policy Preferences for everyone!

There is a very common misconception out there that Group Policy Preferences can only be created, managed and applied to your Windows machines if you are running your domain controllers with Windows Server 2008 or later. This is so NOT true.

What you have to do if you are stuck on domain controllers running Windows Server 2003 is to install the Remote Server Administration Tools on a Windows 7 (or Vista) client machine, add the feature Group Policy Management and then create a GPO in the domain and edit it, configuring the Group Policy Preferences of your choice. Voilà!

I do not know where this myth is coming from actually but the fact that GPO Preferences were introduced in Windows Server 2008 is the major reason I would assume.

Case of the mysterious issues with UAC in Windows 7 and Windows Server 2008 R2

At the TechNet/MSDN after work I attended last week I got an interesting question on why a user (domain admin) gets a UAC popup on trying to access folders via Explorer which he knows for sure he is supposed to be able to access looking at the ACLs of the folder. Instead, when clicking OK on the UAC popup the ACL is populated with his account.

My first thought to this behavior was Explorer.exe not being able to elevate and the “split personality” i.e. the two security tokens involved when UAC is in effect. Here comes a more detailed explanation that I think is of interest to more. Note that this problem also covers some other scenarios such as AppLocker rules not appearing to work as intended for administrators. Read on to learn what is causing this.

First when UAC is enabled you get two security tokens when you log in, easily explained as one which contains the administrator privilege information and one which does not. Most of the times you run everything using the standard security token. When you for instance want to install software or change some system settings, then the security token containing the administrator privileges information is used.

If you do not explicitly request an application to launch with higher privileges, or the applications itself request higher privileges, all processes and applications run in the user context with the standard security token. Virtually all applications including Windows applications and processes are possible to elevate by right clicking and choosing “Run as administrator”. This is not true for Explorer.EXE though as all your attempts to elevate it will not result in any actual elevation. There are a few caveats with this and let us continue with the example of access certain files and folders.

So let’s have a look at what the ACL of the folder D:\Share looks like:

We can clearly see that there are no user accounts in this list. Under normal circumstances any user which is a member of the domain admins group should be able to access that folder but instead is presented with the UAC dialogue:

What happens when the user “stenis” in this case clicks “Continue” to that UAC dialogue box questions is that the ACL is populated with the user account in questions:

This happens because the fact that Explorer.exe cannot be elevated the normal Windows Explorer does not see that the user account should be able to access that folder. It is easy to verify as you can actually run Explorer.EXE elevated by changing the registry setting “RunAs” to “_RunAs” in HKEY_CLASSES_ROOT\AppID\{CDCBCFCA-3CDC-436f-A4E2-0E02075250C2}. Thanks goes to Andre Ziegler for this finding.

So what does this tell us? It is a somewhat strange problem but still by design. The fact is that this “problem” is not applicable to the folder and file access as described in this blog but also for AppLocker rules for instance, as many domain administrators must choose “Run as administrator” to be able to run software which they think they should be able to run without this little procedure.

Windows 7 chat transcript now up

This afternoon I held a chat about Windows 7 hosted by the Swedish MSN website. The chat was in Swedish and I have now put the transcript up for everyone to enjoy at my Swedish Windows site.

Classic shimming tip for forcing apps to run without UAC prompting

If you during your way in testing app compatibility with Windows 7 encounter an application that require a UAC prompt to launch you can suppress this UAC prompt by creating a more or less classic shim “RunAsInvoker”. A few years ago Microsoft posted this as a KB article but not long after it vanished. Now the guide for creating this shim is available in Ask The Performance Team blog and I strongly suggest you put this shimming tip in mind because it might come in handy when you least expect it.

Modify default profile in Windows 7 with the least amount of effort

I’ve received a question on why Microsoft stopped supporting the old way of making changes to the default user profile in Windows 7. As you might already know the only supported way to make changes to the default user profile is to make them with a local user account and then sysprep the image with an answer file containing CopyProfile=TRUE.

The question or should I say problem is that the user in question find it ineffective to make changes to the default user profile, by installing the image to a machine then make the changes and once again to sysprep and capture the image.

Fortunately there is a much more effective way to make changes (though unsupported). Just mount the image using imagex or dism, and then add or remove the files you want. If you want to change some settings they most likely stored in the registry so then you can just start the regedit.exe utility as usual and then mount the ntuser.dat file within the image to make the changes and when done just applying the changes and you are done!