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The digital signature of amd.sata.sys cannot be verified when the Win7 computer is turned on.
1. First, when booting to the system option, press F8 to enter the safe mode immediately. You can press F8 earlier so as not to miss the time.

2. After entering the advanced mode, use the up and down arrow keys on the keyboard to move the cursor to the bottom, find and select "Disable driver signature enforcement", press Enter to enter the system, and then update the hardware driver without signing the driver.

3. Then open "All Programs" from the beginning, find "Command Prompt" from the attachment, right-click and run as an administrator.

4. After entering the command prompt window, enter bcdedit.exe-set load options disable _ integrity _ checks at the cursor, and then press Enter.

5. If driver signature enforcement is successfully disabled, "Operation completed successfully" will be displayed, and driver signature will not block all drivers installed in the future.