It looks like Windows is locking access to the drive. You are certain that Fast Boot and Secure boot are both disabled?
… and advanced (hidden) power settings in Control Panel | Power has the hard drive ‘Sleep’ mode turned off?
I always disable fast boot when I want to use zorin. and at that time, it is in a state of fast boot disabled.
OK I will try it. I hope this works.
I just looked closely at your screenshots and the terminal UI says “zorin@zorin” which is the LiveCD account.
The installed User account would have the username you created during installation along with your Computer Identifier.
Are you running LiveCD as persistent?
I think the problem with the DPKG is not compatible with the 5.40.48 kernel. because when updating the DPKG without updating the kernel the problem is the same as above. different things happen when updating kernel 5.40.47 or before there was never a problem with the DPKG. when will the 5.40.49 kernel be released? I will try to use the kernel.
Running from LiveCD would not work for what you are performing, regardless. Not for this instance. You would want to run from the previous kernel. You can roll back your kernel if needed, if you have not already.
Or, you can roll forward. 5.4.0-48 is the currently released TESTED kernel, but the Linux kernel itself is up around 5.9 now.
Why not try the 5.5.0. kernel and see what happens? If it still produces an error, you can use the recovery mode to revert back to the previous kernel.
That all said, I find it very unlikely that dpkg is having and conflict with the 5.4.0 kernel. Very Unlikely, indeed. I suspect the problem is elsewhere and probably will seem simple in hindsight once we find it.
I think so too, maybe there is a problem somewhere else. i will try again. how to get to the 5.5.0 kernel? I don’t know much about linux. because I am only a daily user to complete school assignments. Thank you for the help. 
. I am sorry, my English is not good.
Installing a kernel is generally the same as installing anything else that you root install.
There are just two things to remember:
The Linux kernel comes in four parts:
- Modules
- Image
- Headers-Generic
- Headers-All
So, when you go to get a Linux Kernel package, always be sure to get and install all four.
The second thing to remember is to update the system after you finish the installation
sudo update-initramfs
Now… Let’s look at how to install the kernel and where you can get your packages.
Here is the complete list:
Let’s look for 5.5 first:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.5.1/linux-headers-5.5.1-050501_5.5.1-050501.202002011032_all.deb
In order to stay organized and keep things simple, once you have downloaded each package, just create a new folder in your ~/Downloads folder named “kernel” and place all four of the above packages and only the four above packages in that folder.
Go into that folder in your file manager and open a terminal OR us the ‘cd’ command in terminal
cd ~/Downloads/kernel
Then use the command to install:
sudo dpkg -i *.deb
Then your update to apply new kernel
sudo update-initramfs
This spares you from trying to install each individually in the Correct Order. It also keeps the copy of the kernel in a safe and easy place you can find or remove afterward.
Your English is quite good. It is a shame on me that I speak only one language (Or at least only one actively used language).
after i re-downloaded my zorin os then installed it, now i can boot in my new 5.51 kernel like never before. but such brought about problems:
this, made me not install any new software through the shop or terminal.
This reminds me of the CPU overclockers, and bikers who rev their bikes to over 7,500 rpm from cold. Or “Don’t fix what ain’t broke.” 
my problem has been resolved.
If dual boot windows & zorin os: boot windows 10 first then open the System Configuration Utility by using the keyboard shortcut “Windows Key + R” and the “Run” window will open. In the text box, write “msconfig” and press Enter or OK and the MsConfig window will open. check selective boot and then restart. then boot into Zorin os then load the partition on the hard disk open the terminal then run
sudo dpkg --configure -a
then run
sudo apt-get upgrade
and reboot. problem will be resolved.
Well done you. And thanks for sharing.
you’re welcome
I have successfully installed the 5.5.18 kernel. i want to delete the 5.5.1 kernel. how to safely delete the 5.5.1 kernel? I tried sudo apt autoremove it couldn’t. thank you
Try Synaptic. Remove “linux-headers” package in addition to “linux-image” package. For terminal method you can try https://unix.stackexchange.com/questions/445669/how-to-safely-remove-old-kernels-headers-and-libraries but I think Synaptic is easier.