I am spending hard times to install Debian 9 on the newly bought Lenovo Thinkpad E560-A. The Secure Boot options are all off in the UEFI Bios settings (as far as I know, at least) and Debian starts installing until it reaches to the point of failure. What the installer displays at this popint is:Unable to install the selected KernelAn error was returned while trying to install the Kernel into the target systemKernel package: 'linux-image-amd64'.check /var/log/syslog or see virtual console 4 for the details.By viewing the tty4 contents, I discovered that there is a Hash Sum mismatch and the expected SHA256 is different from what it finds in-target.I have no idea why it happens al the time and would like to ask you how to  solve the issue and make the installer continue its work until completed successfully. Thank you very much in advance.
Hash Sum mismatch during Debian 9 installation in UEFI system
debian;linux kernel
After looking at documentations over the internet about what hash is, and because I didn't have the hash to my Debian-DVD, I downloaded a fresh Debian-9.1-DVD.iso and checked its hash by executing sha512sum debian-9-dvd.iso and compared it to the hash given by debian.org.Since they matched, I started installing this copy of debian, and it is working perfectly fine. 