metalliko@XPS13:~$ sudo /usr/lib/update-notifier/package-data-downloader
ttf-mscorefonts-installer: processing...
ttf-mscorefonts-installer: downloading http://downloads.sourceforge.net/corefonts/andale32.exe
Get:1 http://downloads.sourceforge.net/corefonts/andale32.exe [198 kB]
Fetched 198 kB in 1s (161 kB/s)
ttf-mscorefonts-installer: downloading http://downloads.sourceforge.net/corefonts/arial32.exe
Get:1 http://downloads.sourceforge.net/corefonts/arial32.exe [554 kB]
Fetched 554 kB in 1s (352 kB/s)
ttf-mscorefonts-installer: downloading http://downloads.sourceforge.net/corefonts/arialb32.exe
Get:1 http://downloads.sourceforge.net/corefonts/arialb32.exe [969 B]
Err:1 http://downloads.sourceforge.net/corefonts/arialb32.exe
  Hash Sum mismatch
Fetched 969 B in 1s (790 B/s)
E: Failed to fetch http://downloads.sourceforge.net/mirrorproblem?failedmirror=vorboss.dl.sourceforge.net  Hash Sum mismatch

E: Download Failed
metalliko@XPS13:~$