upgrade failed debian 8.7

[Mike Nunn <bonnie650@gmail.com>]

uname -a 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux

I ran sudo apt update followed by upgrade

it hangs at the following point:

Setting up linux-image-3.16.0-4-amd64 (3.16.39-1) ...

/etc/kernel/postinst.d/initramfs-tools:

update-initramfs: Generating /boot/initrd.img-3.16.0-4-amd64

Progress: [  0%]

Any advice very gratefully received.

Thanks

Mike