Method 1:
1. First, turn on the computer and quickly press F 12 to enter the bios. Different computers have different buttons to enter the BIOS. Please refer to the figure below.
2. After entering the BIOS, find the option of "secuseboot" and set "SecureBootControl" to "Disabled";
3. Switch to the "boot" option and set "launchcsm" to "Enabled";
4. Finally, find the exit option, set the "organized default" to "enabled", and press "F 10-Y-Enter" to enter the system normally.
Method 2:
1. Press and hold the power supply to forcibly turn off the computer, and the "Repair Computer" option will appear when restarting;
2. Select "Repair Computer" to start the repair, and select "Don't Send" after the repair is completed;
3. Select "View Advanced Options for System Recovery and Support-Command Prompt";
4. Enter "DEL/F/S/QC: Windows System32 Driver DrvPro 64.sys" at the command prompt, and then press Enter to restart.
The above is the whole content of the solution that win7 system can't verify the digital signature of files. Win7 users with similar problems can try the above two methods. If they restart indefinitely, they can press f8 and choose the last correct configuration.