Apparently not all fonts are broken but only some. It's better to substitute fonts with different ones. Security issues fixed by KB3013455 might be important ; )
I've used Microsoft's Power Toy to check which fonts look 'ugly'. And substituted Arial, Times New Roman and Courier New with Liberation alternatives.
I've also tried using fonts from Windows 2008 R2, but it didn't help. To replace the fonts I've used this approach
Copy the new font files somewhere to your system (i.e.
Then use the command line (Windows-Explorer won't work here since it
automatically starts the install routine) to copy the files to
c:\Windows\Fonts under a different name:
copy c:\Temp\tahoma.ttf c:\Windows\Fonts\tahoma_0.ttf
copy c:\Temp\tahomabd.ttf c:\Windows\Fonts\tahomabd_0.ttf
After that use the Registry-Editor to redirect the font names to the
NT\CurrentVersion\Fonts and find the entries
Tahoma Bold (TrueType) and change it's values from
"tahoma.ttf" to "tahoma_0.ttf" and "tahomabd.ttf" to "tahomabd_0.ttf"
Now you only need to restart your system and then the new font files are used.