Microsoft recently reported that Windows 10 October 2018 Update has a bug that causes shutdown delay. According to Microsoft, shutting down a USB Type-C supported Windows 10 device can take a long one minute in certain conditions.
Windows 10 October 2018 Update doesn’t go well with the USB Type-C Connector System Software Interface due to a bug in Microsoft’s implementation. It means if you’re shutting down your PC and a USB Type-C device is being connected or disconnected, the shutdown process could take up to 60 seconds.
This happens because the USB Type-C Connector System Software Interface runs in the background when you connect or disconnect a device from the USB Type-C port.
The bug isn’t a huge issue as your Windows 10 device and USB port will continue to work normally after a restart.
“A bug in the USB Type-C Connector System Software Interface (UCSI) software implementation in Windows 10, version 1809 can cause a 60 second delay in the system sleep or shutdown process if the power-down happens while the UCSI software is busy handling a new connect or disconnect event on a USB Type-C port,” Microsoft explains.
In a new update to the support document, Microsoft says that this bug has been resolved in Windows 10 May 2019 Update. The company is advising affected users to install Windows 10 version 1903 as it fixes the problem.
Microsoft hasn’t confirmed if it also plans to address this bug on Windows 10 October 2018 Update.
“This is resolved in Windows 10 version 1903, please update to the latest released build if you are impacted by this bug,” Microsoft explains.
It’s not known if and when Microsoft will backport this fix to October 2018 Update, but if the slow shutdown issue bothers you regularly, you can upgrade to Windows 10 May 2019 Update.