SCCM 2007 - How to Prevent the Client Software from Being Installed on Specific Computers
You can prevent the Configuration manager 2007 client from installing on specific computers when using the client push or software update poing installation methods by editing the Windows registry.
Here is what you need to do:
Start – Run and type regedt32;
Locate SMS_DISCOVERY_DATA_MANATER sub-key under HKEY_LOCAL_MACHINE/Software/Microsoft/SMS?Components/
Double-click ExcludeServers key to open the Edit Multi-String Window
Specify the name of each computer you want to exclude. Presee the Enter key after typing each computer name to ensure that each computername appears on separate line.
When a computer is added to the ExccludeServers list, it is flagged in the site database with an installed status which prevents the client from reinstalling. So if you later remove the computer from the list, this flag remains. In order to install the clietn software, you have to clean the install Flag.