I was reminded of this movie quote when I stumbled across the following cry for help in a developer’s forum: Whenever I connect to customer site with Citrix Xenapp it takes me around 15-20 minutes for the Remote Desktop Prompt to come up, while for other users it’s almost immediate. My connection is faster than theirs(25/4mbps). What is Citrix XenApp doing that’s taking mine so long - any guesses?

Determining day, month and year on the command line is surprisingly difficult if the solution is to work across locales, i.e. on international systems with different regional settings. Although we can use the variables %DATE% and %TIME% their contents is specific to the locale. If set to German, the date is displayed in the format dd.MM.yyyy, if set to English (United States), the date format is M/d/yyyy.

Problem Firefox (3.6.13) intermittently freezes. This happens during scrolling, text input, basically everywhere in the user interface, rendering the browser nearly useless. Analysis While browsing amazon.de I created a log of Firefox’s activities by recording system activity for 85 seconds with Sysinternals Process Monitor. I then filtered the log to include only Firefox activities. Clicking on Tools -> Process Activity Summary I got:

This article is part of Helge’s Profile Toolkit, a set of posts explaining the knowledge and tools required to tame Windows user profiles. Mandatory profiles are generally considered fast and secure because they usually are small in size and cannot be modified by the user. While that is true – mandatory profiles stay pristine indefinitely – there is more to security than read-only access.

Question by reader Kendra: I stumbled upon your blog/profile while I was looking for options to lockdown my administrative shares. Maybe you can help me. I’m a Network Administrator for an aerospace / engineering firm where users need administrative access to their PCs. The engineers work on very high-level OS and hardware development and need complete control of their systems. As you can imagine this poses a huge security problems for me at the network level. Currently my users are granted local administrator rights via an AD group (Local Admins) which is added to the local Administrators group on their local PCs. This makes it convenient for my engineers to login to any PC in the company and have local admin rights to do whatever they need to do. This also gives all of my users access to each other’s administrative shares across the network. For example, anyone in this AD group can run \computername\c$ and access any PC on my domain. I do NOT want to disable administrative shares as I am using them to automatically deploy desktop configuration settings (email, mapped network drives, printers, etc). Do you know of a way that I can give my engineers local admin rights without giving them rights to each other’s administrative shares? Any help would be greatly appreciated.

This article is part of Helge’s Profile Toolkit, a set of posts explaining the knowledge and tools required to tame Windows user profiles. This article presents a collection of tips and tricks around user state migration with and without Microsoft’s USMT. I originally compiled this material for my presentation at the 2010 TechDay Online.

One of the first things I noticed about Windows Vista and immediately disliked was the new event viewer. The user interface is too cluttered, but more importantly, it is just so very sloooow. It is so slow that I think twice before starting it. And when I do, I almost feel physical pain watching it initialize. Unfortunately, Windows 7 brought no improvements in this area. Just when I thought I was doomed to use this fattened-up Garfield version of an event viewer for years to come, Twitter buddy Kimmo Jernstrom described how to get back the good old “classic” event viewer on modern versions of Windows.

I had a strange error on this Wordpress installation: The author page would not display, instead, I got a 404 (not found). This is the description of how I fixed it.

Until yesterday, SetACL’s web presence consisted of six static HTML pages. That was great for speed, but it sucked in almost every other aspect. And the design … better not speak about that. The old website was hosted on Sourceforge, on the subdomain setacl.sourceforge.net, to be exact. High time for a radical change. I wanted a good clean design, interactivity (commenting), easy maintenance and my own domain. And I wanted a place where I could assemble and store all the relevant content I publish on the web, namely blog articles and tweets. This is the story of the creation of that place.

This article is part of Helge’s Profile Toolkit, a set of posts explaining the knowledge and tools required to tame Windows user profiles. More and more people are upgrading to a 64-bit version of Windows. Many of them would probably like to keep their existing configuration. The question is: can you use the 32-bit profile on Windows x64? Is there even such a thing as a 32-bit or a 64-bit user profile? Or are profiles independent of the system’s bitness?

Here is the slide deck for my presentation User profiles inside out from PubForum Berlin 2010. Enjoy.

There are two equivalent ways trustees can be assigned a specific set of permissions on Windows: via generic rights and via a combination of standard and specific rights. Generic rights are identical for all object types. There are only four of them:

Why can you start Mozilla Firefox by typing “firefox” in the Run dialog and press enter? Firefox.exe is not located in any directory in the path. The same with Outlook (type “outlook”), PowerShell (“powershell”), VMware Workstation (“vmware”) or Adobe Reader (“acrord32”). This “magic application starting thingy” works because of a little-known Windows feature based on the “App Paths” registry key.

When dealing with Windows NTFS file system permissions, one quickly encounters the SYNCHRONIZE access right, the purpose of which may not be obvious. SYNCHRONIZE belongs to the standard access rights, just like DELETE, READ_CONTROL, WRITE_DAC and WRITE_OWNER.

This article is part of Helge’s Profile Toolkit, a set of posts explaining the knowledge and tools required to tame Windows user profiles. When administrators migrate user accounts between domains, they typically re-ACL those server resources users have access to. In plain English: they copy or move the permissions from the accounts of the old domain to the corresponding accounts of the new domain. There are various ways to do that. In this article, I present a simple way to re-ACL roaming user profiles.

Sometimes you need a list of all the files and/or folders in a directory with their full path, without any additional information. “DIR /B” would be the right command, if it only printed out the full path (it does that only if combined with the recursion parameter /S).

Here is an interesting tidbit related to Windows security: Create a test file share, e.g. C:\temp\test, and share it with full permissions for everyone (share, not NTFS permissions) as “test” Create the following directory hierarchy below the share: C:\temp\test\1\2\3\4 Assign ownership of the four folders 1, 2, 3 and 4 to any user (but do not use your own account, just anyone else’s) Set permissions on 1, 2, 3 and 4 that only the user from the previous step has full access, nobody else, not even the SYSTEM Now try to use SetACL to change the owner of directory “4” over the network (SetACL uses backup and restore privileges so this should be no problem) by issuing the following command locally: setacl -on \localhost\test\1\2\3\4 -ot file -actn setowner -ownr n:domain\administrator SetACL will fail with access denied (full message: “ERROR: Writing SD to <\?\UNC\localhost\test\1\2\3\4> failed with: Access is denied.”) Now issue the same command, but instead of using a UNC path use the local drive letter: setacl -on c:\temp\test\1\2\3\4 -ot file -actn setowner -ownr n:domain\administrator That works! Why is this so? I have no clue.

NTFS permissions are stored in the file system, that is well known. But where are share permissions stored? As so often with Windows: in the registry. Network shares are defined by only a handful of relatively simple registry entries stored in the server service’s key which is, for historical reasons that go back way beyond OS/2, named “LanmanServer” (the workstation service is similarly named “LanmanWorkstation”).

Generally I am not the type to recommend re-implementing functionality present in some API. But with the Windows function CopyFile(Ex) there may be no alternative, because of the less than sub-optimal way Windows copies EFS-encrypted files:

A desktop delivered from the cloud, accessible from everywhere, providing just the right amount of computing power for the task at hand, maintained by the cloud provider and paid for only when used - a dream? Or a commodity in ten years’ time? Time will tell, but in the meantime let us find out if such a virtual wonder device is even possible.

Here are some pretty cool ways to work with the Windows registry. Regedit Multiple Instances Start multiple instances of Regedit by appending the command-line parameter -m, e.g.: regedit -m. Multiple instances of RegeditExporting/Importing Favorites Regedit’s favorites are a handy way to get to keys you often need. The list of favorites is stored in the registry (where else?): HKCU\Software\Microsoft\Windows\CurrentVersion\Applets\Regedit\Favorites. Exporting the favorites to a .REG file can easily be automated with reg.exe (see below).

Migrating a blog can be a very painful process, part of which stems from the fact that, if not done correctly, search engine valuation (aka PageRank) that took years to gain may be lost in days. Redirecting from the old blog to the new URL alleviates this problem at least, but not the way it is described on countless websites that recommend implementing JavaScript redirects search engines do not care about. Instead HTTP 301 redirects are needed which unfortunately required access to the .htaccess file on the web server hosting the old blog to set up. And you may have guessed already - Blogger.com does not grant that type of access.

Only a few days ago I attended PubForum in Frankfurt - a weekend well spent! I had an altogether good time and very much enjoyed meeting so many great people. I also presented on the topic of migrating to 64-bit Windows Server 2008 R2 and XenApp 6, a task not to be taken lightly. For anyone interested, here is the slide deck I used.

This article is part of Helge’s Profile Toolkit, a set of posts explaining the knowledge and tools required to tame Windows user profiles. Redirecting AppData from the user profile to a folder on the network may significantly improve logon speed. Is enabling AppData redirection a no-brainer, then? Not really, because it often comes at a price: performance.