If there was a known issue with your device when trying to use it with certain versions of Windows, that might be understandable, but this wouldn't be a situation where this USB device doesn't work with Dell laptops but works with some other vendor's laptops. If it was a USB-serial adapter, then you wouldnt be able to access it in.
The COM number is assigned to the USB serial port adapter itself whenever it's connected, and again that's all handled by Windows, not the system. Is the serial port on dell laptop port replicators sufficiently fast for code. There isn't a COM number for the entire system. Also, just to clarify something, in your original post you asked for the "USB serial port COM number" of your Dell system.
They relate to operating system versions, because the operating system would require certain drivers and the operating system assigns COM ports (which the user can change through Device Manager). 2.Now click on View then select Show hidden devices. 1.Press Windows Key + R then type devmgmt.msc and hit Enter to open Device Manager. This page contains the driver installation download for USB-Serial Controller in supported models (OptiPlex 3020) that are running a supported operating. Method 1: Uninstall Universal Serial Bus (USB) Controller Driver. Make sure to create a restore point just in case something goes wrong. Counterfeit IC products show exactly the same outside chip markings but generally are of poor quality and causes Windows driver compatibility issues. Fix Universal Serial Bus (USB) Controller Driver Issue. Drivers and COM port issues would not relate to specific to system models. Please be warned that counterfeit (fake) PL-2303HX (Chip Rev A) USB to Serial Controller ICs using Prolific's trademark logo, brandname, and device drivers, were being sold in the China market. This package contains the nVIDIA Quadro graphics driver. Unfortunately no, and I have no idea why they would have told you to contact Dell. 3 will not boot from USB on my new Dell Precision 5820 tower that uses a nvme M.