APPLE20 15 problem description: install win7, and the system will be blank after restarting. The following information is prompted: The reason why windows can't start may be that the hardware or software file has been changed recently: windows System32 driver App SSD. Sys status: 0xc0000428 Information: Windows cannot verify the digital signature of this file. ParagonNTFS is installed under 1 MAC (this can be downloaded for trial in official website 14 days). 2. Restart the MAC after installation. 3. After entering the MAC, use Paragon to go to window7 disk and kill AppleSSD.sys in windowssystem32drivers. 4. Restart it to windows, and the installation will continue without any problems. The system can be used normally, but the BootCamp in the USB flash drive can't be used. You can find Du Niang to download the official version v5. 1.5640 of Boot Camp. Here's another question. Windows driver was not installed because the Bootcamp in the USB flash drive could not be installed. You can manually install some solutions: BootCamp (Mac dual system driver) v5. 1.5640 official version. Copy the downloaded Bootcamp to Windows system under Mac with Paragon, then enter win7 system, install Bootcamp, and the driver can be done at once.