How to fix win10 dual system boot boot error

How to fix Win10 and win7 dual system boot error

Method 1: Manual fix

Run bcdedit /set {current} bootmenupolicy Legacy fix in win7 and win10 respectively

Method 2: Use software NTbootautofix repair;

Go online and download NTbootautofix

Download the file and unzip it, then run it directly;

Press the number key 1 to start repairing automatically;

4. Wait for the completion of the exit option to appear, press the number key 2 to exit and then restart can be.

After the release of Win10 Preview, many users chose to upgrade, but there are some users who didn't upgrade right away due to the fear of various incompatibilities with the new system, but out of the idea of wanting to try it out, and thus many of them chose to install a dual system. Although the dual system seems to be the perfect solution to this problem, the trouble doesn't end there.

New problems have arisen, with the Metro boot menu, and a reboot no matter which system you choose to boot, which is a real pain in the ass, and the ntbootautofix autofix, which does nothing. Finally, after fiddling around for a while, I found a way to fix it. Here are the specific steps:

1, download NTBOOTautofix v2.5.7

2, double-click to open --- select 2 Advanced --- select 4 View / Manage BCD boot configuration will see the following chart

Select A ---- and then select M

After selecting 0 to return to the --- and then select B ---- again! Select M

After rebooting, you will find that the familiar boot screen is back again. Note: As this is a personal experience, I can't confirm the consequences of this modification, so if you want to solve the problem in this way, you need to consider it carefully to avoid other consequences.