Upgrade win10 blue screen has been restarted how to do

Microsoft yesterday opened a Win10 free upgrade to Win7/Win8.1 users, because users use computer hardware and software environment vary widely, some users can not smoothly upgrade to Windows10 due to various problems, or after the upgrade is successful There was a problem in the process.
In this regard, Microsoft community management analysis may be caused by the graphics card driver, some users can try to disable the discrete graphics (for dual graphics models) in safe mode or uninstall the graphics driver to solve similar problems.
The blue screen is mostly caused by the driver problem. The safe mode startup environment only loads some necessary system files and drivers, which can eliminate the influence of third-party software or drivers. If there is no blue screen or unlimited restart in safe mode, then basically it can be judged that it is the influence of third-party software or driver, users can uninstall one by one to check.
Enter safe mode to disable the graphics card or uninstall the graphics driver:

▲Open Settings —Update & Security—Restore—Click "Start Now" in the Advanced Startup

▲Click<quo;Troubleshoot"

▲Click “Advanced Options"

▲Click “Start Settings”

▲Click “Restart”

▲Press F4 to enter safe mode

▲ After entering the safe mode, select ““Device Manager” in the right button of the start button.

▲Find the graphics card in the right click menu. Disable graphics card or uninstall graphics driver