Home Forums Tech Helproom Usbmmu.sys error with new wireless mouse.. help? Forum Rules | Contact Forum Editor | Report a Post Usbmmu.sys error with new wireless mouse.. help? Gerard Fagan 21:48 21 Jun 2018 Locked Usbmmu.sys error - help? Hi I keep getting the BSOD everytime i plug in my new wireless mouse straight away. Usbmmu.sys is the error My old wireless mouse (double clicks when i click so is broke) works fine How do i fix this or is it a faulty mouse This thread is now locked and can not be replied to.