These settings allow you to optimize the I/O priority of specific processes, so that processes which are contending for disk and network I/O access do not cause performance bottlenecks. For example, you can use I/O Management settings to throttle back a disk-bandwidth-hungry application.
The process priority you set here establishes the "base priority" for all of the threads in the process. The actual, or "current," priority of a thread might be higher (but is never lower than the base). In general, Windows give access to threads of higher priority before threads of lower priority.
Enable Process I/O Priority. Enables manual setting of process I/O priority.
To add a process to the I/O priority list
Process Name. The process executable name without the extension. For example, for Windows Explorer (explorer.exe) type "explorer".
I/O Priority. The "base" priority of all threads in the process. The higher the I/O priority of a process, the sooner its threads get I/O access. Choose from High, Normal, Low, Very Low.
To edit a process I/O priority item
Select the process name and click Edit.
To remove a process from the I/O priority list
Select the process name and click Remove.