Lists PCI devices with their current interrupt affinity policy in Out-GridView, then pins the interrupts of the devices you select to the CPU cores you pick in a second grid (P/E-cores labeled on hybrid CPUs). Writes the documented DevicePolicy / AssignmentSetOverride registry values. Zero external dependencies. Windows PowerShell 5.1+.

Lists PCI devices, shows their MSI status in Out-GridView, and enables MSI for the devices you select. Zero external dependencies. Windows PowerShell 5.1+.