I installed Ubuntu software centre from Muon Discover in Kubuntu, it installed fine & I installed a couple of programs within it which were also fine, I then decided to install Wine (this is not listed in Muon) the installation froze so I rebooted & ever since I get the following message ~

DATA files for some packages could not be downloaded

The following pacakages requested additional data downloads after package installation, but the data could not be
downloaded or processed....ttf-mscorefonts-installer...This is a permanent failure that leaves these packages unusable on your system.

Now I can hide the message & I have not noticed anything strange happening but it would be good to know what went wrong & I don't want stuff on my systen that shouldn't be there. I'm still learning Linux so plain English answers would be prefered please as I'm not up on command line stuff yet unless it's simple.
Thanks.

I guess, you will have to open a terminal, and use the command line :

$ sudo apt-get update
.. I.e. there is no updating of the package listings in Muon, AFAIK.
That's probably why dozens of packages sometimes are missing.

Suggest : Install a better 'Package Installer' : synaptic
→ $ sudo apt-get install synaptic
.. "synaptic" 1) has a Refresh button 2) All packages are present.
But : You will always have to hit the 'Refresh button' before installs,
to insure that all updated packages and dependencies are available.

P.S. : It's only the 'Muon Software Center' that often fails,
the "Muon Updater" is always working OK.

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Thank you, I will try those suggestons