If Avast is still installed, uninstall it and see how it goes.
If it doesn't help, disconnect every USB device with exception for mouse and keyboard.
There is a Windows USB driver, it is not flagged but could be an indication.
Code:
0: kd> !irp ffffe001f9df79d0 Irp is active with 7 stacks 5 is current (= 0xffffe001f9df7bc0) No Mdl: No System Buffer: Thread 00000000: Irp stack trace. cmd flg cl Device File Completion-Context [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 >[ 16, 2] 0 e1 ffffe001f9e1f960 00000000 00000000-00000000 pending DriverACPI Args: 00000000 00000001 00000001 00000000 [ 16, 2] 0 e1 ffffe001fa5c6b20 00000000 fffff800f512ca68-ffffe001faaf7680 Success Error Cancel pending DriverUSBXHCI nt!PopRequestCompletion Args: 00000000 00000001 00000001 00000000 [ 0, 0] 0 0 00000000 00000000 00000000-ffffe001faaf7680 Args: 00000000 00000000 00000000 00000000