During an update of an App-V package I discovered a bug in RES Workspace Manager. I will first summarize the software and versions which are used for the deployment. Then I will explain the issue I encountered.
Operating System: Windows 7
Virtualazation Client: Microsoft App-V 4.6.0.1523
Workspace Manager: RES Workspace Manager 2011 SR2 with Fix Pack 5 (9.5.2.5)
And also tested with
Workspace Manager: RES Workspace Manager 2011 SR4 with Fix Pack 6 (9.5.4.6)Deployment: Microsoft Configuration Manager 2007 R2

Having a healthy application virtualization infrastructure platform involves configuring the App-V client with the appropriate settings. Today there are two main ways of configuring the client, either during the initial client installation process or afterwards.
I was searching for a quick way to restore to a default installation. After a search I found “Differencing Disk”. Here is some information about differencing disk from Microsoft TechNet.