Many users bought new computers with win8 pre-installed, but they were more accustomed to using win7, so they began to install win7 system in depth. However, after the system was installed, there was a prompt that the digital signature of the file could not be verified, which led to the inability to enter the system. What should I do? In fact, this is because SecureBoot is not closed. Here, Bian Xiao will introduce you to the solution that the boot prompt can't verify the digital signature of the file after installing win8 with win7.

Solution:

1. Press F2 to enter the bios setup. Different brands of computers enter the bios in different ways. You can search yourself.

2. Set SecureBoot to disable; ;

3. Set CSM to enable; Again;

4. Finally, set the BootMode to both/legacyfirst/legacysupport;

5. Press F 10 or Fn+F 10 to save and exit.

The above is what to do if the boot prompt can't verify the digital signature of this file after win8 installs win7. Friends who encounter similar problems can follow the above method.