Yes, Trusteer Rapport does break App-V

You may have encountered problem with slow logons, slow startups, and slow access to applications when using App-V in conjunction with security software known as Trusteer Rapport. The Trusteer Rapport issue is timing related. It also appears to have a signficant effect on Windows XP machines (since the App-V Client service cannot be set to…


App-V: Don’t use WMI for querying virtual registries.

It is important to understand that the virtual registry is designed for virtualization of an application’s registry and it facilitates it through the interception of standard Win32 registry APIs. These APIs (i.e. RegOpenKeyEx, RegEnumKeyEx,  RegEnumValue,  RegCreateKeyEx, etc.) I have, from time to time, dealt with alleviating confusion with how to access the virtual registry. I…


App-V: The Case of the Lingering File Type Association

I recently encountered an issue where a customer deployed a virtualized instance of Adobe Reader and then later moved to a locally installed version. The customer was wondering why clicking on the PDF documents resulted in the virtualized instance of Adobe Reader trying to open the document (which was removed so an error was displayed.)…


MED-V v1: Error: “System.NullReferenceException: Object reference not set to an instance of an object” when trying to browse for users using the “Find” option using the MED-V v1 Server Configuration utility.

When using the MED-V Server Configuration utility (serversettings.exe)) you will get an exception when you attempt to use the search capability to find users in Active Directory. If you select the permissions tab, then select add, then select find, then select advanced, and then select find now. Finally, select one or two user groups. Click…


The Case of the Three Second Delay (a.k.a What is SFTDDE?)

A while back I encountered an issue that forced me to become introduced to the DDE Launcher used by App-V (SFTDDE.)  A customer was encountering an issue where, no matter how much they tuned their terminal servers, even with pre-cached virtual applications; Office applications appeared to always have a three second delay when they double-clicked…


MED-V V2, V1, or XP Mode?

It looks like both MED-V v1 and v2 will be around for the remainder of the Windows XP support lifecycle. Because of this, I often I get asked the question, “Which version of MED-V should I be using?” as well as “Why should I be using MED-V instead of Windows XP mode?” The following table…


App-V: Unable to click “Join Meeting” from Virtualized Outlook when Live Meeting 2007 is Installed Locally

If you have virtualized MS Office and have decided to use a local installation of Live Meeting, you may run into this issue. When a user attempts to click on a Live Meeting link (click on “Join Meeting” link) within a virtualized Office application (primarily Outlook) to join the Live Meeting session, they may get…


MED-V v1: How to Configure MED-V Client-Side SSL

For MED-V v1, Client-side TLS/SSL security is an optional configuration which can be set to ensure only legitimate clients connect to the server. This will take security one-step further than the traditional server-based TLS/SSL. To configure client-side SSL on the server: 1.) Verify SSL is enabled on the server (refer to Configuring Server Settings (on…