Numbers all over the place!!???

HI, I am so confused. I have looked and looked, installed and un installed FS to cure a problem I don't know how I created.Somehow I have blocks of numbers on my tarmats at many of the large airport such as KBOS, KSEA, KJFK, and others. I also notice the my sceneries are mixed up. At first I thought it was a texture problem since I see other texture objects on the sides of buildings.I've updated my video drivers and only using freeware sceneries. I have RWY12 installed and that is about it.Any suggestion? I apologize if this has been discussed elsewhere. I just can't find the answer,or I'm not phrasing the question right.Thanks for any helpMonnieBest regardsJan1,KINDWhen I push the button and it works, I'm happy:-)