2. Select "Disable driver signature enforcement" in the advanced startup menu, and then press enter to enter;
At this time, you will find that this item can enter normally. In fact, this problem is because a driver that failed to pass the digital signature was installed, which caused the system to prevent win7 from starting.
4. After entering the system, enter the "C:\Windows\System32\drivers" folder and delete the emsc.sys file;
5. If any device has an exclamation point when entering the device manager, uninstall the driver of the device;
6. Finally, download the correct driver and install it.
The above is the solution that Win7 system can't start, suggesting that emsc.sys can't verify the digital signature. If you have friends who encounter the same problem, you can refer to the above solutions.