Enables Message Signaled Interrupts on every OK network device by writing MSISupported = 1 under each NIC's PnP instance (Device Parameters\Interrupt Management\MessageSignaledInterruptProperties). MSI lets the NIC post interrupts directly (like the GPU MSI tweak) instead of sharing a legacy line IRQ, which lowers DPC latency and interrupt-sharing contention. Only enable on adapters whose driver supports MSI (virtually all modern PCIe NICs do); a driver that doesn't can fail to start, in which case run the revert and reboot. Reboot required. Reversible (revert sets MSISupported back to 0), though exact prior per-device state isn't snapshotted.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows-hardware/drivers/kernel/introduction-to-message-signaled-interrupts