Disable or enable the application isolation function on Windows 8
First introduced in Windows 7 and Windows Server 2008 R2, Windows Printing Driver Isolation feature, removed an isolated driver from the print spooler process and loaded it into a sandbox. If an insulated conductor fails, the spooler printing process is not affected.
Application isolation function in Windows 8
Application isolation is a new print function in Windows 8 and Windows Server 2012 that isolates applications from printer drivers so that applications do not lock when a printer driver crashes, making the application more stable. This feature extends an existing Windows 7 feature (SplWoW64) to include all labeling scenarios in Windows Server 2012 and Windows 8