When you install Omnissa ThinApp to virtualize applications use a clean computer and the earliest operating system version that your users require.
Using a Clean Computer
Use a clean computer to install ThinApp because the computer environment affects the application capture process. A clean computer is a physical or virtual machine with only a Windows operating system installed.
In a corporate environment where you have a base desktop image, the base desktop image is the clean computer. The desktop computer might already have some components and libraries installed.
Application installers skip files that already exist on the computer. If the installer skips files, the ThinApp package does not include them during the application capture process. The application might fail to run on other computers on which the files do not exist. A clean computer enables the capture process to scan the computer file system and registry quickly.
The easiest way to set up a clean computer is to create a virtual machine. You can install Windows on the virtual machine and take a snapshot of the entire virtual machine in its clean state. After you install and capture an application, you can restore the clean virtual machine snapshot, reverting it to a state that is ready for the next application capture.
You can use VMware Workstation or other VMware products to create virtual machines.
If you install ThinApp and capture an application on a computer that has Microsoft .NET 2.0 already installed, NET 2.0 is not included in the ThinApp package. The captured application runs only on computers that have .NET 2.0 already installed.
Using the Earliest Operating System Required for Users
Install ThinApp on a clean computer with the earliest version of the operating system you plan to support. In most cases, the earliest platform is Windows 2007 or Windows Server 2008 r2. Most packages captured on Windows 7 work on Windows Server 2008 R2. In some cases Windows 7 includes some DLLs that Windows Server 2008 lacks. ThinApp excludes these DLLS from the captured application package if the application typically installs these DLLs.
After you create a ThinApp application package, you can overwrite files in the package with updated versions and rebuild the application without the capture process.
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