Your network contains an Active Directory domain named contoso.com. You have several Windows PowerShell scripts that execute when client computers start.
When a client computer starts, you discover that it takes a long time before users are prompted to log on. You need to reduce the amount of time it takes for the
client computers to start. The solution must not prevent scripts from completing successfully. Which setting should you configure? To answer, select the appropriate
setting in the answer area.
Hot Area:
Answer: 
Run startup scripts asynchronously
The answer is correct. “asynchronously” means the scripts can run simultaneously, thereby reducing the logon time, but still allowing all the scripts to run.
https://technet.microsoft.com/en-us/library/cc939423
https://msdn.microsoft.com/en-us/library/ms811602.aspx