What to do when Windows 7 crashes at boot time

The phenomenon is that four small balls of light have not appeared or are stuck in half.
Please try to disable ACPI in the BIOS when the problem occurs.
If the above method is invalid, please use PE or Win7 system installation disk (repair mode) to boot into the system before proceeding with the installation, replace the Windows7 partition with the following file. Winload.exe file
For example, when Win7 is installed on the D drive, the path of the Winload.exe file is D: WindowsSystem32Winload.exe
This file is extracted from the Windows 7 Beta 7000 installation disk, and the experiment confirms this version of Winload. The probability of exe being incompatible with the new version is lower.
After replacing the file, please restart the computer to continue Windows7