Here's the script I developed following Roger's suggestion: WorkspaceONE/hide-installer.ps1 at master · tsmagnum/WorkspaceONE · GitHub
I used PowerShell. The logic is very simple: we look for the WS1 installer and, if present, we will delete the key.
We also check if the OS is x86 or x64 to locate the right key.
I included in the script PowerShell's common parameters, so you can run it using "-debug" in a PowerShell console to troubleshoot the execution in case of problem.
I deployed it to my clients using a product with a Files/Actions component, downloading the script in C:\Temp, executing it and then deleting it after the execution.
Please test the script before deploying it in production environments.
Thanks again to RogerDeane !