Alternatively, if you don't use infrared, you can often the device in Device Manager to stop Windows from alerting you about the missing driver. IrDA Fast Infrared Port Driver for Acer - Extensa 5620
Before attempting fixes, confirm the device is truly problematic. acpi nsc6001
It has an NSC6001 for a serial controller. Alternatively, if you don't use infrared, you can
In the late 1990s and early 2000s, National Semiconductor produced highly integrated "Super I/O" (Input/Output) chips for motherboards. These chips handled legacy functions that the main chipset no longer wanted to manage, such as: if you don't use infrared
Typically utilizes DMA 01 for high-speed data transfer. Driver and Support Information