Dual-system or triple-system Windows 10 fails to boot:
如果能进入ubuntu: try to perform grub auto-update
sudo update-grubThen see if the output contains the boot items of Win10, if so, try to reboot into win10 boot.
If there is win10 boot, but after win10 boots, the system is in a black screen state, only an underline is flashing, please reboot into boot, try to use windows boot manager to start and then select win10 to start.
Boot and enter the user password, then the driver, tty can not log in to the system
The problem is mostly caused by the graphics card driver. You can try to use the recovery mode to enter the system, select the fsck item, then select the root item and enter reboot to restart. At this time, there is a high probability that you can log in to the system, and then the first thing is to open "Software and Updates" ”, find the additional driver, and switch the graphics card driver from Kaiyuan driver to NVIDIA closed source driver. This problem is common in previous versions of ubuntu, mainly due to the backward software version, but the problem is particularly obvious in ubunu18. After the graphics card driver installation is complete, restart the system several times, and you should be able to use the system without any problems.