Hi there,
And Welcome Here…
Have you looked at the Wiki for the Xiao device you are using?
Ii you hold down the reset button and plug it into the USB does it make the windows “new Device Found” sound?
Does the double press reset button fast work to get into BL (bootloader) mode? Try some of the things in the WiKi and report back. After a few posted reply’s you’ll gain enough forum Cred to start a new thread with your exact issue.
HTH
GL 
PJ 