Have seen 3 threads that are close to this problem, but not the same
a couple hours ago I noticed that my system fonts had suddenly changed. They have a black outline around each of the text characters.
I have tried changing themes, wallpaper, font display, doing a system restore, running antivirus software and taking the advice on the other threads including altering system properties (appearance: effects and advanced options)
nothing seems to work and it is very frustrating and very difficult to read (I had to turn the bold option on under properties: appearance: advanced options)