Can't update or install software

[kqlnut]

I suggest you try diving just a little bit deeper into Linux territory and change that mirror (if alternative mirrors can be found, e. g. in /etc/pacman.d/mirrorlist). It's really not that complicated, the instructions I wrote above are already pretty much step by step. Do a little search engine searching if you don't understand something and things will quickly become much clearer. Maybe consider doing one of the many freely available Linux beginner's tutorials if you are completely new to it. The file I mentioned (/etc/pacman.conf) is just a file (like everything on Linux), you can open and edit it with e. g.

Code:

sudo nano /etc/pacman.conf

Then insert a new mirror directly below all the mentioned section headings (everywhere the same mirror where only "$repo" in the URL is replaced with the respective heading like "core", "community" etc.). Mirrors should be found in /etc/pacman.d/mirrorlist. For more detailed instructions and examples refer to the linked Arch Wiki article. The Arch Wiki is a great place to look up stuff anyway.
Learning by doing is the best approach.