on startup: package shim-signed 1.33.1~16.04.1+13-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script was killed by signal (Terminated)

I also can't mount my windows 10 partition which has been correctly shut down

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: shim-signed 1.33.1~16.04.1+13-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
Uname: Linux 4.13.0-36-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
.proc.sys.kernel.moksbstate_disabled: Error: [Errno 2] No such file or directory: '/proc/sys/kernel/moksbstate_disabled'
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
Date: Sat Mar 3 22:52:09 2018
EFITables:
 mar 04 10:48:02 csggnn-Inspiron-7566 kernel: efi: EFI v2.40 by American Megatrends
 mar 04 10:48:02 csggnn-Inspiron-7566 kernel: efi: ACPI=0x9917b000 ACPI 2.0=0x9917b000 SMBIOS=0xf0000 ESRT=0x9a268598
 mar 04 10:48:02 csggnn-Inspiron-7566 kernel: esrt: Reserving ESRT space from 0x000000009a268598 to 0x000000009a2685d0.
 mar 04 10:48:02 csggnn-Inspiron-7566 kernel: Secure boot disabled
ErrorMessage: subprocess installed post-installation script was killed by signal (Terminated)
InstallationDate: Installed on 2018-03-03 (0 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
MokSBStateRT: 6 0 0 0 1
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.24
SecureBoot: 6 0 0 0 1
SourcePackage: shim-signed
Title: package shim-signed 1.33.1~16.04.1+13-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script was killed by signal (Terminated)
UpgradeStatus: No upgrade log present (probably fresh install)