Q. How can I stop Microsoft Application Virtualization (App-V) from automatically caching an entire virtualized application?

A. In App-V 4.5 and above, once Feature Block 1 is downloaded, the entire Feature Block 2 content is also downloaded and cached in the background. Prior to version 4.5, Feature Block 2 content was only cached as required. You can control this automatic loading of Feature Block 2 using options outlined here.

One of the easiest ways to configure this behavior is a registry setting on the client, which can also be set via Group Policy. The values of HKLM SOFTWAREMicrosoftSoftGridClientCurrentVersionConfigurationAutoLoadTriggers (REG_DWORD) are:

You can also set which applications the autoload policy applies to using HKLMSOFTWAREMicrosoftSoftGridClientCurrentVersionConfigurationAutoLoadTarget. Set it to one of the following:

I advise leaving the default pre-cache of FB2 on launch and logon as the best option. Only change it if you have a significant business or technical reason.