Create a remote command in BP to add the desired registry key/value. The command could be a ‘reg add’ command like described here:
Microsoft’s documentation for Reg Add
Create a second remote command in BP to stop the desired service, e.g.
WMIC SERVICE where caption='DNS Client' CALL stopservice
Create a third remote command in BP to start the desired service, e.g.
WMIC SERVICE where caption='DNS Client' CALL startservice
Create a fourth remote command in BP to check the value of the registry entry, e.g.
REG QUERY "HKLM\Software\Microsoft\.NETFramework" /v InstallRoot
Then create a BatchPatch Job Queue that executes all of the four commands sequentially, with whatever desired wait periods you want added in between any of the steps that you want to wait.
https://batchpatch.com/using-the-job-queue-in-batchpatch-for-multi-step-execution