Ygtjki

I want to install Manjaro OpenBox 18.02 in Dualboot with Windows 10. W10 is already installed on my computer.

I create a partition with 70GB on my SSD in order to install Manjaro. ( only 70GB because I would like to send the /home in the partition that I created on my second hard disk, next to the partition that contains my personal windows 10 files. ).
The installation is done correctly. Then I want to update the packages, so I use this command:

sudo pacman -Syu

The package update starts and after a few minutes, my PC screen turns black (it doesn't go into standby mode) and the login screen reappears after few minutes. I log in and I can't anything. For exemple, if I press super+enter to open the terminal, and a pop up appears :

Failed to execute default Terminal Emulator.
Input/output error.

I can run Xtern from the menu and when I run the command :

sudo pacman -Syuu 

This message appears :

Error: GPGME error: Invalid crypto engine
Error: accountsservice: missing required signature
:: File /var/cache/pacman/pkg/accountsservice-0.6.54+0+g204a4ab-2-x86_64.pkg.tar.xz is corrupted ( invalid or corrupted package ( PGP signature)).
Do you want to delete it [Y/n]

If I press Y, the same message appears but with different packages :

• alsa-lib-1.1.8-1-x86_64.pkg.tar.xz packages


• libxau-1.0.9-1-x86_64.pkg.tar.xz


• atk-2.32-1-x86_64.pkg.tar.xz

i tried :

sudo pacman-key --init
pacman-key --populate archlinux manjaro
pacman-key --refresh-keys

But I still have the same mistake.

The iso works perfectly in a virtual machine with VMWare on a 60GB disk and with the same connection (the 4G of my smartphone).

My computer is MSI GL73 8RD.