By default, Windows writes kernel-mode drivers and system code to the Windows page file when not in use, which leaves more RAM available for the system. This action generates additional storage I/O, which we prefer to limit in a Horizon environment.

If the virtual machine is assigned sufficient memory, this feature is unnecessary and therefore should be disabled to reduce the per-desktop storage I/O. The following steps outline how to disable paging of the executive:

1. From an elevated Windows Command Prompt, load the regedit.exe application.
2. Navigate to HKLM | System | CurrentControlSet | Control | Session Manager | Memory Management.
3. Update the Disable Paging Executive DWORD to a value of 1 (from 0) to disable the feature.