How to configure action not to install

[TheCookieMonster]

I would set relevance to check for the application existence.

if (exists keys whose (value "DisplayName" of it as string as lowercase starts with "silverlight") of key "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall" of x64 registry) then (true) else (false)

if it exist you can switch it to false so it excludes it. so:

if (exists keys whose (value "DisplayName" of it as string as lowercase starts with "silverlight") of key "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall" of x64 registry) then (false) else (true)

you also want to look at this for the x64 instance its no necessary. but you can use it.

Report All Different Instances per Registry

So, based on the if…then…else statement, you’re only going to get the first matching result. Instead you need to get plural results. You can do this with by building a “set” of results on the fly by delimiting the clauses with semicolons. There’s also no need to force ‘x64 registry’ when you’re only looking beneath Wow6432Node. Try this - Get all of the SmartClientIDs values "SmartClientIDs" of keys "HKEY_LOCAL_MACHINE\SOFTWARE\Ellie Mae\SmartClient" of registry as string Transform the …

and then place the Tasks in a Baseline and the Task when its executed it will just skip if relevance has a false statement.