This script will work around the issues present in Kali's Windows Subsystem for Linux version, which currently errors when you try to `apt update`, and if you get around that, errors during an `apt upgrade`. This was last tested as working on 10/12/2022

InstallAndUpgradeKaliWSL2.md

In Powershell, before you've installed Kali:

wsl --set-default-version 2
wsl --install -d kali-linux

Now create your Kali username and password. Then...

sudo su

(enter the password you just created)

wget http://http.kali.org/kali/pool/main/k/kali-archive-keyring/kali-archive-keyring_2022.1_all.deb
dpkg -i kali-archive-keyring_2022.1_all.deb
apt update
apt full-upgrade -y

It will error out, this is expected.

cd /tmp/
apt download libcrypt1 -y
dpkg-deb -x libcrypt1_1%3a4.4.28-2_amd64.deb .
cp -av lib/x86_64-linux-gnu/* /lib/x86_64-linux-gnu/
apt -f -y install
apt full-upgrade -y

If the wget command fails the Kali keyring probably got updated. Locate the newest version here. It'll be the file that ends with "_all.deb".

If the dpkg-deb command fails libcrypt1 probably got updated. Either use ls /tmp/ to locate the new filename, or start typing dpkg-deb -x libcrypt1 and hit tab (but don't forget the space + period at the end of the command)

Credit goes to @MooreDerek and @niallriddell for their posts/responses here