There are two possible causes for the bug, and Microsoft details both of them in the linked document:

Windows will not be able to complete any task that requires that port,” Microsoft says. “If you connect a USB printer to Windows 10 version 1903 or later, then shut down Windows and disconnect or shut off the printer, when you start Windows again the USB printer port will not be available in the list of printer ports. If the printer isn’t there, then there’s a good chance that your Windows 10 device has the problem described here. To do this, on your Windows device navigate the following path and look for your printer: Start > Settings (gear icon) > Devices > Printers & Scanners > Print Server Properties > Port tab In a tech support document that was spotted by German site Deskmodder, Microsoft explains that the easiest way to tell if your device is affected by this problem is to simply check if the printer shows up in the list of printer ports. In other words, if you use a USB printer to print your documents, then after the update to one of the affected Windows 10 versions, the device might no longer show up, obviously making it impossible to print.įor the time being, it looks like it’s all happening totally randomly, so while the printer might work just fine right now, it could go dark in a second.

The new issue concerns USB printers, which may go missing all of a sudden on certain computers.

Microsoft has just acknowledged a new bug in Windows 10 version 1903 and later, and these include the recently-released version 2004, also known as May 2020 Update, as well.

Windows 10 usb001 port missing