You can simply write an agent procedure that checks this registry value:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Kaseya Agent Service Helper
If it is not present, create it and put in the path to the kausrtsk.exe executable in it, e.g.
c:\program files (x86)\Kaseya\CLNID#vMachine.agentInstGuid#\kausrtsk.exe
This will fix it if it's gone from the startup for whatever reason. If you just want to give it a "kick" and get it going when its dead, just write an agent procedure that runs it if it isn't running:
IF kausrtsk.exe is not running
execute file c:\program files (x86)\Kaseya\CLNID#vMachine.agentInstGuid#\kausrtsk.exe - (and choose "run as user")
(Note that in both of these scenarios the actual path to the executable is not going to have CLNID but your actual client ID - check a machine with the agent and you'll see what I mean; the agent install directory is different on each machine but can be created programmatically) or you can use "Get Variable" and choose "Agent Install Directory Path" - it adds one more step but then the Agent Procedure will work seamlessly if imported onto a different kserver that has a different client ID.
-Matt