I have a lattitude E5570 purchased in 2016. Worked fine until yesterday when it started to boot, logged in, got teh home screen, then a blue screen with System thread error. Reviewing possible causes/solution online stated it was probably a driver issue and should boot in safe mode to find and fix the driver. First I tried to revert to a previous version when in safe mode because I know other computers were getting updates and that is usually when things go very wrong. The revert to previous version did not work. Booted in safe mode a second time and reviewed the system logs (looking for a particular driver that might be an issue and found 4 warnings and 1 error. Warning 1: Driver\wudfrd failed to load for device acpi\int3400\2&daba3ff&0.  Warning 2: Driver\wudfrd failed to load for device usb\vid_0a5c&pid_5834&mi_01\6&81a7e03&0&0001  (sometimes shows up twice). Warning 3 Driver\wudfrd failed to load for device cvusbdrv\wbf_provider_touch\7&116e08d2&0&513. Warning 4: Driver\wudfrd failed to load for device bcmnfcusb\nfc_provider\7&13787e1f&0&257 and error said it stored info in Memory.dmp but could not read file with notepad.  Any ideas?