To understand this process, you have to look at the history of Windows printing.
(Best for physical identification)
Bypassing isolation = security incident
The PrintIsolationHost.exe process is a critical system component in Windows designed to improve the reliability and stability of the printing subsystem. Introduced with Windows 7 and Windows Server 2008 R2, it serves as the executable for the feature, which prevents faulty printer drivers from crashing the entire Print Spooler service. What is PrintIsolationHost.exe? printisolationhost