The specific print queue using that isolated host becomes unavailable. Other printers keep working.
A buggy printer driver in an infinite loop or leaking memory. printisolationhost exe
HKLM\SYSTEM\CurrentControlSet\Control\Print Create DWORD: EnableIsolatedDrivers = 0 But this is a troubleshooting step only, not a permanent configuration. Modern Windows versions ignore this setting if drivers explicitly request isolation. The specific print queue using that isolated host
For the average home user, the process will quietly run in the background whenever you print, using negligible resources. For IT administrators, understanding how to configure, monitor, and troubleshoot printisolationhost.exe is an essential skill for maintaining a healthy printing environment. For IT administrators
# List all drivers and their current isolation setting Get-PrinterDriver | Select Name, PrinterEnvironment, DriverIsolation Set-PrinterDriver -Name "HP Universal Printing PCL 6" -DriverIsolation Isolated Change back to "Shared" Set-PrinterDriver -Name "HP Universal Printing PCL 6" -DriverIsolation Shared
printisolationhost.exe is a protected system file. Even if you delete it (which requires taking ownership and overriding permissions), Windows File Protection will restore it. Moreover, disabling print isolation would revert to the dangerous pre-Windows 7 model where drivers run inside the spooler.